View source for Sum 41

{{Short description|Canadian rock band}}
{{Use mdy dates|date=December 2023}}
{{Use Canadian English|date=December 2023}}
{{Infobox musical artist
| name              = Sum 41
| background        = group_or_band
| image             = Sum 41 - Southside Festival 2024 - DSC2886.jpg
| image_size        = 
| landscape         = Yes
| caption           = Sum 41 at [[Southside Festival]] in 2024
| alias             = Pain for Pleasure
| origin            = [[Ajax, Ontario]], Canada
| genre             = {{flatlist|
* [[Pop-punk]]
* [[skate punk]]
* [[punk rock]]
* [[alternative metal]]
* [[melodic hardcore]]
* [[alternative rock]]
}}
| discography       = [[Sum 41 discography]]
| years_active      = 1996–2025
| label             = {{flatlist|
* [[Island Records|Island]]
* [[Aquarius Records (Canada)|Aquarius]]
* [[Hopeless Records|Hopeless]]
* [[Rise Records|Rise]]
}}
| spinoffs          = {{flatlist|
* [[The Operation M.D.]]
* [[Brown Brigade]]
* [[Organ Thieves]]
* Gravas
}}
| spinoff_of        = Kaspir
| website           = {{URL|sum41.com}}
| past_members      = 
* [[Deryck Whibley]]
* [[Steve Jocz]]
* Jon Marshall
* Grant McVittie
* Richard Roy
* [[Dave Baksh]]
* [[Mark Spicoluk]]
* [[Jason McCaslin]]
* [[Tom Thacker (musician)|Tom Thacker]]
* [[Frank Zummo]]
}}

'''Sum 41''' <!-- PLEASE DO NOT CHANGE FROM "WAS" TO "IS". The band is no longer active as of March 30, 2025. -->was<!-- PLEASE DO NOT CHANGE FROM "WAS" TO "IS". The band is no longer active as of March 30, 2025. --> a Canadian [[Rock music|rock]] band formed in [[Ajax, Ontario]], in 1996. The band's final lineup consisted of [[Deryck Whibley]] (lead vocals, guitars, keyboards), [[Dave Baksh]] (lead guitar, backing vocals), [[Jason McCaslin]] (bass, backing vocals), [[Tom Thacker (musician)|Tom Thacker]] (guitars, keyboards, backing vocals), and [[Frank Zummo]] (drums, occasional backing vocals).

In 1999, Sum 41 signed an international record deal with [[Island Records]] and released its first EP, ''[[Half Hour of Power]]'', in 2000. The band released its debut album, ''[[All Killer No Filler]]'', in 2001. The album achieved mainstream success with its first single, "[[Fat Lip]]", which reached number one on the [[Alternative Songs|''Billboard'' Modern Rock Tracks]] chart and remains the band's most successful single to date. The album's next singles "[[In Too Deep (Sum 41 song)|In Too Deep]]" and "[[Motivation (Sum 41 song)|Motivation]]" also achieved commercial success. ''All Killer No Filler'' was certified platinum in both the United States and the United Kingdom and triple platinum in Canada. In 2002, the band released ''[[Does This Look Infected?]]'', which was also a commercial and critical success. The singles "[[The Hell Song]]" and "[[Still Waiting (Sum 41 song)|Still Waiting]]" both charted highly on the modern rock charts.

The band released its next album, ''[[Chuck (Sum 41 album)|Chuck]]'', in 2004, led by singles "[[We're All to Blame]]" and "[[Pieces (Sum 41 song)|Pieces]]". The album proved successful, peaking at number 10 on the [[Billboard 200|''Billboard'' 200]]. In 2007, the band released ''[[Underclass Hero]]'', which was met with a mixed reception, but became the band's highest-charting album to date. It was also the band's last album on [[Aquarius Records (Canada)|Aquarius Records]]. The band released the album ''[[Screaming Bloody Murder]]'', on [[Island Records]] in 2011 to a generally positive reception, though it fell short of its predecessors' commercial success. The band's sixth studio album, ''[[13 Voices]]'' was released in 2016, through [[Hopeless Records]]. [[Independent Music Companies Association|IMPALA]] awarded the album with a double gold award for 150,000 sold copies across Europe. The band's seventh studio album ''[[Order in Decline]]'' was released on July 19, 2019. It was the band's last album on Hopeless Records. The band's eighth and final studio album, ''[[Heaven :x: Hell]]'', was released on March 29, 2024, through [[Rise Records]]. The band disbanded in March 2025, following a [[Tour of the Setting Sum|final worldwide headlining tour]] and their induction into the [[Canadian Music Hall of Fame]].

The band often performed more than 100 times each year and held long global [[Concert tour|tours]], most of which lasted more than a year. The group was nominated for seven [[Juno Awards]] and won twice – [[Juno Award for Group of the Year|Group of the Year]] in 2003, and [[Juno Award for Rock Album of the Year|Rock Album of the Year]] for ''Chuck'' in 2005. Sum 41 was nominated for a [[Grammy Award for Best Hard Rock/Metal Performance]] for the song "[[Blood in My Eyes]]". From their formation to 2016, Sum 41 were the 31st best-selling Canadian artist in Canada.<ref>{{cite web|url=https://bdsradio.com/pd/docs/Nielsen_Canadian150_2017_vs2.pdf|title=Nielsen Music & Billboard Presen Canada 150 Charts|website=bdsradio.com|page=28|access-date=March 28, 2022|archive-url=https://web.archive.org/web/20200102202137/https://bdsradio.com/pd/docs/Nielsen_Canadian150_2017_vs2.pdf|archive-date=January 2, 2020|url-status=dead}}</ref>

==History==

===1994–1998: Formative years===
Sum 41 has its origins in the band Kaspir, which was formed by [[Deryck Whibley]] and Grant McVittie in 1994, inspired by [[Weezer]] and [[Nirvana (band)|Nirvana]]. As time went on, the band's drummer was replaced by [[Steve Jocz]] and the music became increasingly inspired by [[NOFX]], particularly their 1991 album ''[[Ribbed]]''. Seeing this change as too sonically dissimilar to their original sound, they decided to form a new band and to change their sound because they sounded "like the early nineties rock music we used to listen to, and don't anymore".<ref name=":0">{{Cite book|last=Whibley|first=Deryck|title=Walking Disaster|publisher=[[Gallery Books]]|year=2024|isbn=9781408719732|location=New York|language=en}}</ref><ref name="99.9 Radio">{{cite AV media|people=[[Steve Jocz]]|date=October 11, 2023|title=Steve Jocz Aka Stevo Of Sum 41 Interview On 99.9 Punk World Radio FM (1st Interview In 10 Years)|type=Radio interview|url=https://www.youtube.com/watch?v=Ih2e_XeoOQs|access-date=October 29, 2023|time=2m–7m|publisher=99.9 Punk World Radio FM}}</ref> The band chose the name "Sum 41" after looking at the calendar and counting how many days it had been from the start of their summer break to the day the [[Warped Tour 1996|Warped Tour]] was on and seeing that it was forty-one days.<ref name=":0" /> The band debuted its new name during [[Battle of the Bands|Supernova's Battle of the Bands]] on September 28, 1996.<ref name=":0" /><ref name="Exclaim Gormely">{{cite web|first=Ian|last=Gormely|url=https://exclaim.ca/music/article/sum_41_survive_teen_stardom_substance_abuse_and_changing_tastes_to_rise_again_on_out_for_blood|title=Sum 41 Survive Teen Stardom, Substance Abuse and Changing Tastes to Rise Again on 'Out for Blood'|work=[[Exclaim!]]|date=July 12, 2019|access-date=December 14, 2023|archive-url=https://web.archive.org/web/20230412015924/https://exclaim.ca/music/article/sum_41_survive_teen_stardom_substance_abuse_and_changing_tastes_to_rise_again_on_out_for_blood|archive-date=April 12, 2023|url-status=live}}</ref><ref>{{cite magazine|first=Sam|last=Coare|url=https://www.kerrang.com/the-rise-of-sum-41-as-told-through-their-most-important-gigs-deryck-whibley-interview-download-festival|title=The rise of Sum 41, as told through their most important gigs|magazine=[[Kerrang!]]|date=June 5, 2024|access-date=October 19, 2024|archive-url=https://web.archive.org/web/20240605113349/https://www.kerrang.com/the-rise-of-sum-41-as-told-through-their-most-important-gigs-deryck-whibley-interview-download-festival|archive-date=June 5, 2024|url-status=live}}</ref> The first lineup to use this name included Whibley, Jocz, McVittie and Jon Marshall.<ref name="99.9 Radio" /> Another early member was bassist Richard Roy who shortly replaced McVittie.<ref name="auto"/>

Their first televised live performance was at ''Jonopalooza'', on the Canadian teen talk show [[Jonovision]] hosted by [[Trailer Park Boys]] star, and Canadian comedian, [[Jonathan Torrens]].<ref>{{cite web|first=Justin|last=Crowe|url=https://screenrant.com/trailer-park-boys-behind-the-scenes-facts/#jonathan-torrens-hosted-his-own-talk-show|title=It's Not Rocket Appliances: 10 Hilarious Trailer Park Boys Behind-The-Scenes Facts Most Fans Didn't Know|work=[[Screen Rant]]|date=March 3, 2021|access-date=December 14, 2023|archive-url=https://web.archive.org/web/20230926214513/https://screenrant.com/trailer-park-boys-behind-the-scenes-facts/#jonathan-torrens-hosted-his-own-talk-show|archive-date=September 26, 2023|url-status=live}}</ref>

The band met their manager and producer [[Greig Nori]], also the lead vocalist of the band [[Treble Charger]], in 1996 at Jonopalooza,<ref name="Exclaim Gormely"/> and Whibley convinced Nori to watch his band perform.<ref name="Exclaim Gormely"/>  Nori was not impressed with the band's songs or the original vocalist Jon Marshall and advised Whibley to be the vocalist instead causing Marshall to leave.<ref name="auto"/><ref name="Exclaim Gormely"/>  With Whibley moving to lead vocals and rhythm guitar, [[Dave Baksh]], a friend of Deryck and Steve and fellow student at Exeter High School, joined as lead guitarist.<ref name="auto"/> During the band's first tour in [[New Brunswick]], the band was involved in a near-fatal car accident, when their [[Ford E-Series|Ford Econoline]] [[van]] was [[Side collision|broadsided]] by an [[Ford F-Series|F-150]]; Roy, who was driving the van, quit the band after returning home.<ref name="auto"/><ref name="stevo accident">{{Cite web|url=https://www.youtube.com/watch?v=UbPwG8Vrtbo|title=Sum 41's First Tour Was A DISASTER!|date=August 7, 2024|via=YouTube}}</ref> [[Mark Spicoluk]] briefly filled in as the band's new bassist in 1998, until he was replaced by [[Jason McCaslin]], another friend of the band's and student at Exeter High School, in 1999.<ref>{{cite web|url=https://www.youtube.com/watch?v=zd4zA1P_C1E|title=Sum 41 Studio Update 18|date=February 18, 2010|access-date=March 26, 2022|archive-url=https://ghostarchive.org/varchive/youtube/20211102/zd4zA1P_C1E|archive-date=November 3, 2021|url-status=live|publisher=YouTube }}{{cbignore}}</ref><ref>{{Cite AV media |url=https://www.youtube.com/watch?v=UbPwG8Vrtbo |title=Early Sum 41 History! 1st Tour! Summer! |date=2024-08-07 |last=((Stevo32Drums)) |access-date=2024-08-07 |via=YouTube}} Event occurs from 5:51 to 6:19.</ref> In 1996, the band opened for [[Len (band)|Len]].<ref name="Exclaim Gormely"/>

===1998–2000: ''Half Hour of Power''===
{{Main|Half Hour of Power}}
In 1998, the band recorded a demo tape on [[compact cassette]] which they sent to record companies in the hope of getting a recording contract.<ref name="Exclaim Gormely"/>

From 1999 to 2000, the band recorded several new songs.<ref name="sonic1029">{{cite web|url=https://www.sonic1029.com/2017/11/24/look-infected-turns-15/|title=Does This Look Infected? Turns 15|work=Sonic1029|date=November 24, 2017|access-date=December 14, 2023|archive-url=https://web.archive.org/web/20230415160940/https://www.sonic1029.com/2017/11/24/look-infected-turns-15/|archive-date=April 15, 2023|url-status=dead}}</ref><ref name="Sum 41 Plan DVD">{{cite web|first=Jon|last=Wiederhorn|url=http://www.mtv.com/news/1452491/sum-41-plan-dvd-live-b-sides-monthlong-tour/|title=Sum 41 Plan DVD, Live B-Sides, Monthlong Tour|work=[[MTV]]|date=February 21, 2002|access-date=December 14, 2023|archive-url=https://web.archive.org/web/20230424125846/https://www.mtv.com/news/qsy4zn/sum-41-plan-dvd-live-b-sides-monthlong-tour|archive-date=April 24, 2023|url-status=dead}}</ref> The ''[[Introduction to Destruction]]'' and later the ''[[Cross The T's and Gouge Your I's]]'' DVDs both contain the self-recorded footage, which show the band performing a dance to "[[Makes No Difference]]" in front of a theatre.<ref name="sonic1029"/><ref name="Sum 41 Plan DVD"/>

After signing with [[Island Records]] in 1999, Sum 41's first EP, ''[[Half Hour of Power]]'', was released on June 27, 2000.<ref>{{cite web|first=Curtis|last=Zimmermann|url=https://www.allmusic.com/album/half-hour-of-power-mw0000066795|title=Sum 41 Half Hour of Power|work=[[AllMusic]]|access-date=December 14, 2023|archive-url=https://web.archive.org/web/20210309062856/https://www.allmusic.com/album/half-hour-of-power-mw0000066795|archive-date=March 9, 2021|url-status=live}}</ref> The first [[single (music)|single]] released by the band was "[[Makes No Difference]]", which had two different [[music video]]s.<ref>{{cite web|url=http://www.mtv.com/bands/archive/s/sum41_01_7q/index.jhtml|title=7 Questions with Sum41|work=[[MTV]]|access-date=February 21, 2011|archive-url=https://web.archive.org/web/20101224020529/http://www.mtv.com/bands/archive/s/sum41_01_7q/index.jhtml|archive-date=December 24, 2010|url-status=dead}}</ref> The first video was put together using the video clips sent to the major label, and the second showed the band performing at a house party.<ref>{{cite web|url=http://www.mtv.com/artists/sum-41/biography|title=Sum 41 Bio|year=2007|work=[[MTV]]|access-date=January 27, 2023|archive-url=https://web.archive.org/web/20130510193953/http://www.mtv.com/artists/sum-41/biography/|archive-date=May 10, 2013|url-status=dead}}</ref> The album was certified platinum in Canada.<ref>{{cite web|url=https://www.cbc.ca/music/how-canada-helped-shape-pop-punk-1.6408797|title=How Canada helped shape pop-punk|work=[[Canadian Broadcasting Corporation|CBC]]|date=April 11, 2022|access-date=December 14, 2023|archive-url=https://web.archive.org/web/20230509171324/https://www.cbc.ca/music/how-canada-helped-shape-pop-punk-1.6408797|archive-date=May 9, 2023|url-status=live}}</ref>

===2001–2003: ''All Killer No Filler'' and ''Does This Look Infected?''===
{{Main|All Killer No Filler|Does This Look Infected?}}

Sum 41's first full-length album, ''[[All Killer No Filler]]'', was released on May 8, 2001.<ref name="AM All Killer No Filler">{{cite web|first=Jason|last=Birchmeier|url=https://www.allmusic.com/album/all-killer-no-filler-mw0000003255|title=All Killer, No Filler – Sum 41|work=[[AllMusic]]|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20230404160627/https://www.allmusic.com/album/all-killer-no-filler-mw0000003255|archive-date=April 4, 2023|url-status=live}}</ref><ref>{{cite web|first=Philip|last=Trapp|url=https://loudwire.com/sum-41-deryck-whibley-all-killer-wasnt-that-great/|title=Sum 41's Deryck Whibley Doesn't Think 'All Killer No Filler' Was 'Very Good'|work=[[Loudwire]]|date=April 8, 2021|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20230608064953/https://loudwire.com/sum-41-deryck-whibley-all-killer-wasnt-that-great/|archive-date=June 8, 2023|url-status=live}}</ref> The album was very successful; it was certified platinum by the [[Recording Industry Association of America]] in August 2001.{{Certification Cite Ref|artist=Sum 41|type=album|region=United States|title=All Killer No Filler}} "[[Fat Lip]]", the album's first single,<ref name="Allmusic overview">{{cite web|first=Johnny|last=Loftus|url=https://www.allmusic.com/artist/sum-41-mn0000585574/biography|title=Sum 41 Biography & History|work=[[AllMusic]]|access-date=August 17, 2008|archive-url=https://web.archive.org/web/20230405102155/https://www.allmusic.com/artist/sum-41-mn0000585574/biography|archive-date=April 5, 2023|url-status=live}}</ref><ref>{{cite magazine|first=Tyler|last=Sharp|url=http://www.altpress.com/news/entry/sum_41s_fat_lip_turns_15|title=Sum 41's "Fat Lip" turns 15|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=April 22, 2016|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20160422191152/http://www.altpress.com/news/entry/sum_41s_fat_lip_turns_15|archive-date=April 22, 2016|url-status=dead}}</ref><ref>{{cite magazine|first=Tyler|last=Sharp|url=http://www.altpress.com/news/entry/sum_41s_fat_lip_turns_15|title=Sum 41's "Fat Lip" turns 15|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=April 22, 2016|access-date=April 22, 2016|archive-url=https://web.archive.org/web/20160422191152/http://www.altpress.com/news/entry/sum_41s_fat_lip_turns_15|archive-date=April 22, 2016|url-status=dead}}</ref> achieved significant chart and commercial success; it topped the US [[Alternative Songs|''Billboard'' Modern Rock Tracks]] chart as well as many other charts around the world.<ref name="Artists Chart History">{{cite magazine|url=https://www.billboard.com/artist/sum-41/chart-history/|title=Fat Lip – Sum 41|magazine=[[Billboard (magazine)|Billboard]]|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20230406231821/https://www.billboard.com/artist/sum-41/chart-history/|archive-date=April 6, 2023|url-status=live}}</ref> The song remains the band's most successful to date. After "Fat Lip", two more singles were released from the album: "[[In Too Deep (Sum 41)|In Too Deep]]" and "[[Motivation (Sum 41 song)|Motivation]]".<ref name="Allmusic overview"/><ref name="AM All Killer No Filler"/><ref>{{cite web|first=Sara|last=Murphy|url=https://exclaim.ca/music/article/sum_41s_in_too_deep_was_originally_a_reggae_collab_between_treble_charger_and_snow|title=Sum 41's "In Too Deep" Was Nearly a Reggae Song with Treble Charger and Snow|work=[[Exclaim!]]|date=March 8, 2018|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20190712155419/https://exclaim.ca/music/article/sum_41s_in_too_deep_was_originally_a_reggae_collab_between_treble_charger_and_snow|archive-date=July 12, 2019|url-status=live}}</ref> "In Too Deep" peaked at number 10 on the Modern Rock Tracks chart, while "Motivation" peaked at number 24 on the same chart.<ref name="Sum 41 Billboard">{{cite magazine|url=https://www.billboard.com/artist/sum-41/chart-history/mrt/|title=Sum 41 Chart history|magazine=[[Billboard (magazine)|Billboard]]|access-date=February 12, 2018|archive-url=https://web.archive.org/web/20220428164102/https://www.billboard.com/artist/sum-41/chart-history/mrt/|archive-date=April 28, 2022|url-status=live}}</ref> The album peaked at number 13 on the [[Billboard 200|''Billboard'' 200]] chart and at number nine on the [[Top Canadian Albums]] chart.<ref name="All Killer No Filler Billboard 200">{{cite magazine|url=https://www.billboard.com/artist/sum-41/chart-history/cna/|title=Sum 41 All Killer No Filler|magazine=[[Billboard (magazine)|Billboard]]|access-date=February 12, 2018|archive-url=https://web.archive.org/web/20211124133939/https://www.billboard.com/artist/sum-41/chart-history/cna/|archive-date=November 24, 2021|url-status=live}}</ref> The album was a commercial success, and was certified [[RIAA certification|Platinum]] in the United States, UK, and triple platinum in Canada<ref>{{cite magazine|first=Gavin|last=Edwards|url=https://www.rollingstone.com/artists/sum41/articles/story/5918959/people_of_the_year_2001_sum_41|title=People of the Year 2001: Sum 69|magazine=[[Rolling Stone]]|date=December 17, 2001|access-date=August 19, 2008|archive-url=https://web.archive.org/web/20090211183220/http://www.rollingstone.com/artists/sum41/articles/story/5918959/people_of_the_year_2001_sum_41|archive-date=February 11, 2009|url-status=dead}}</ref><ref>{{cite web|first=Adria|last=Young|url=https://www.vice.com/en/article/retrospective-reviews-sum-41s-all-killer-no-filler/|title=SRetrospective Reviews: Sum 41's "All Killer No Filler"|work=[[Vice Media|Vice]]|date=May 8, 2014|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20201029144327/https://www.vice.com/en/article/rzejg3/retrospective-reviews-sum-41s-all-killer-no-filler|archive-date=October 29, 2020|url-status=live}}</ref> The album's name was taken from the initial reaction from Joe Mcgrath, an engineer working in the studio.<ref>{{Citation|url=https://www.youtube.com/watch?v=BA0lcNY6wt8|title=Sum 41 - Wikipedia: Fact or Fiction?|work=Loudwire|date=November 2, 2016|access-date=March 27, 2022|archive-url=https://ghostarchive.org/varchive/youtube/20211102/BA0lcNY6wt8|archive-date=November 3, 2021|url-status=live}}{{cbignore}}</ref>

The band spent much of 2001 touring; the group played over 300 concerts that year before returning to the studio to record another album.<ref name="Sum Like it Loud Tour">{{cite web|first=Jon|last=Wiederhorn|url=http://www.mtv.com/news/articles/1452491/20020221/sum_41.jhtml|title=Sum 41 Plan DVD, Live B-Sides, Monthlong Tour|work=[[MTV]]|date=February 21, 2002|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20040510164839/http://www.mtv.com/news/articles/1452491/20020221/sum_41.jhtml|archive-date=May 10, 2004|url-status=dead}}</ref> The band took part in the 2001 Vans Warped Tour<ref name="Vans Warped Tour 2001">{{cite web|first=Lydia|last=Pudzianowski|url=https://www.popmatters.com/sum-41-all-killer-no-filler|title=20 Years On, Sum 41's 'All Killer No Filler' Is a Classic Pop-Punk Party|work=[[PopMatters]]|date=May 7, 2021|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20210507133533/https://www.popmatters.com/sum-41-all-killer-no-filler|archive-date=May 7, 2021|url-status=live}}</ref> and the Campus Invasion Tour.<ref name="Campus Invasion Tour 2001">{{cite magazine|url=https://www.billboard.com/music/music-news/mtv-tour-sends-american-hi-fi-back-to-campus-80216/|title=MTV Tour Sends American Hi-Fi Back To Campus|magazine=[[Billboard (magazine)|Billboard]]|date=March 30, 2001|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20220404023442/https://www.billboard.com/music/music-news/mtv-tour-sends-american-hi-fi-back-to-campus-80216/|archive-date=April 4, 2022|url-status=live}}</ref> In April 2002, the band went on a month long tour called the ''Sum Like it Loud Tour''.<ref name="Sum Like it Loud Tour"/>

On May 3, 2002, [[Spider-Man (2002 film)|Spider-Man]] was released in theaters which featured an extended version of the song from Sum 41's first album "Half Hour of Power" called  "[[What We're All About]]",<ref>{{cite magazine|first=Tom|last=Sinclair|url=https://ew.com/article/2002/03/28/see-wholl-be-spider-man-soundtrack/|title=See who'll be on the ''Spider-Man'' soundtrack|magazine=[[Entertainment Weekly]]|date=March 28, 2002|access-date=September 27, 2023|archive-url=https://web.archive.org/web/20220810053052/https://ew.com/article/2002/03/28/see-wholl-be-spider-man-soundtrack/|archive-date=August 10, 2022|url-status=live}}</ref> which in the album was combined with another short song called "Dave's Possessed Hair". The song was listed on the album as "Dave's Possessed Hair/It's What We're All About".<ref name=Half>{{cite web|first=Curtis|last=Zimmermann|url=https://www.allmusic.com/album/half-hour-of-power-mw0000066795|title=Half Hour of Power – Sum 41|work=[[AllMusic]]|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20120622144915/https://www.allmusic.com/album/half-hour-of-power-mw0000066795|archive-date=June 22, 2012|url-status=live}}</ref>

In October 2002, the band went on a month long tour called the ''Sum on Your Face Tour''.<ref name="Sum on Your Face Tour">{{cite web|first=Jon|last=Wiederhorn|url=https://www.mtv.com/news/1458210/sum-41-ready-for-intimate-sum-on-your-face-tour/|title=Sum 41 Ready For Intimate Sum On Your Face Tour|work=[[MTV]]|date=October 18, 2002|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20181105005617/https://www.mtv.com/news/1458210/sum-41-ready-for-intimate-sum-on-your-face-tour/|archive-date=November 5, 2018|url-status=dead}}</ref> On November 26, 2002, the group released its second album, ''[[Does This Look Infected?]]''<ref name="Metal">{{cite web|first=Joe|last=D'Angelo|url=https://www.mtv.com/news/cslsh8/sum-41-ask-does-this-look-infected|title=Sum 41 Ask, Does This Look Infected?|work=[[MTV]]|date=September 13, 2002|access-date=October 20, 2008|archive-url=https://web.archive.org/web/20230130055508/https://www.mtv.com/news/cslsh8/sum-41-ask-does-this-look-infected|archive-date=January 30, 2023|url-status=dead}}</ref><ref>{{cite magazine|first=Karen|last=Bliss|url=https://www.rollingstone.com/music/music-news/sum-41-get-infected-244560/|title=Sum 41 Get Infected|magazine=[[Rolling Stone]]|date=October 3, 2002|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20180711091425/https://www.rollingstone.com/music/music-news/sum-41-get-infected-244560/|archive-date=July 11, 2018|url-status=dead}}</ref> The special edition came with a DVD, ''Cross The T's and Gouge Your I's''. Whibley said of the album: "We don't want to make another record that sounds like the last record, I hate when bands repeat albums."<ref>{{cite book|last=Edwards|first=Gavin|title=Canadian Teenage Rock and Roll Machine.|editor=[[Rolling Stone]]|publisher=Wenner Media|date=October 11, 2001|page=50}}</ref> The album featured a harder and edgier sound, and the lyrics featured a more serious outlook.<ref>{{cite web|first=Stuart|last=Green|url=http://exclaim.ca/music/article/sum_41-does_this_look_infected|title=Sum 41 Does This Look Infected?|work=[[Exclaim!]]|date=February 1, 2003|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20151222153618/http://exclaim.ca/music/article/sum_41-does_this_look_infected|archive-date=December 22, 2015|url-status=live}}</ref> The album peaked at number 32 on the ''Billboard'' 200 chart and at number eight on the Top Canadian Albums chart.<ref>{{cite web|first=Chad|last=Childers|url=https://loudwire.com/sum-41-does-this-look-infected-15th-anniversary-tour/|title=Sum 41 to Revisit 'Does This Look Infected?' for 15th Anniversary Tour|work=[[Loudwire]]|date=February 13, 2018|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20180216034637/https://loudwire.com/sum-41-does-this-look-infected-15th-anniversary-tour/|archive-date=February 16, 2018|url-status=live}}</ref> It was certified Platinum in Canada and gold in the United States.<ref>{{cite web|url=https://musiccanada.com/gold-platinum/?_gp_search=Does+This+Look+Infected%3F%20Sum+41|title=Canadian album certifications – Sum 41 – Does This Look Infected?|work=[[Music Canada]]|date=December 18, 2002|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20220829121800/https://musiccanada.com/gold-platinum/?_gp_search=Does+This+Look+Infected%3F%20Sum+41|archive-date=August 29, 2022|url-status=live}}</ref><ref>{{cite web|url=https://www.riaa.com/gold-platinum/?tab_active=default-award&ar=Sum+41&ti=Does+This+Look+Infected%3F&format=Album&type=|title=American album certifications – Sum 41 – Does This Look Infected?|work=[[Recording Industry Association of America|RIAA]]|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20210730112629/https://www.riaa.com/gold-platinum/?tab_active=default-award&ar=Sum+41&ti=Does+This+Look+Infected%3F&format=Album&type=|archive-date=July 30, 2021|url-status=dead}}</ref>

The first single released from the album was "[[Still Waiting (Sum 41 song)|Still Waiting]]",<ref name="Still Waiting single">{{cite web|first=Gareth|last=Dobson|url=http://drownedinsound.com/releases/5665/reviews/5440-|title=Single Review: Sum 41 - Still Waiting |work=[[Drowned in Sound]]|date=November 20, 2002|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20210507181751/https://drownedinsound.com/releases/5665/reviews/5440-|archive-date=May 7, 2021|url-status=dead}}</ref> which peaked at number seven on the Modern Rock Tracks chart.<ref name="Sum 41 Billboard"/><ref name="Still Waiting single"/><ref>{{cite journal|title=Does This Look Infected|journal=[[People (magazine)|People]]|volume=59}}</ref> The second single, "[[The Hell Song]]" peaked at number 13 on the chart.<ref name="Sum 41 Billboard"/> "The Hell Song"'s music video depicted the band members using dolls with their pictures on them and others, such as [[Korn]], [[Kiss (band)|Kiss]], [[AC/DC]], [[Snoop Dogg]], [[Destiny's Child]], [[Ozzy Osbourne]], [[Sharon Osbourne]], and [[Pamela Anderson]].<ref name="Jon Wiederhorn MTV">{{cite web|first=Jon|last=Wiederhorn|url=http://www.mtv.com/news/1470504/sum-41-get-all-dolled-up-for-hell-song-video/|title=Sum 41 Get All Dolled Up For 'Hell Song' Video|work=[[MTV]]|date=March 12, 2003|access-date=June 27, 2019|archive-url=https://web.archive.org/web/20171227011506/http://www.mtv.com/news/1470504/sum-41-get-all-dolled-up-for-hell-song-video/|archive-date=December 27, 2017|url-status=dead}}</ref> The third single, "[[Over My Head (Better Off Dead)]]", had a video released exclusively in Canada and on the band's website, featuring live shots of the band.<ref>{{cite magazine|first=Jack|last=Rogers|url=https://www.rocksound.tv/features/read/sum-41-music-video-history|title=Sum 41: Music Video History|magazine=[[Rock Sound]]|date=June 20, 2019|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20190627235439/https://www.rocksound.tv/features/read/sum-41-music-video-history|archive-date=June 27, 2019|url-status=dead}}</ref> The video also appeared on the group's live DVD, ''[[Sake Bombs and Happy Endings]]'' (2003), as a bonus feature.<ref name="Jon Wiederhorn MTV"/> The band again began a long tour to promote the album before recording the group's third studio album.<ref name="Allmusic overview"/>

===2004–2005: ''Chuck''===
{{Main|Chuck (Sum 41 album)}}
In late May 2004, the band traveled to the [[Democratic Republic of the Congo]] with [[War Child (charity)|War Child Canada]], a branch of the British charity organization [[War Child (charity)|War Child]], to document the effects of the [[Second Congo War|country's civil war]].<ref name="MTV">{{cite news|first=Joe|last=D'Angelo|url=http://www.mtv.com/news/articles/1485897/03222004/sum_41.jhtml|title=Sum 41 Plan Trip To War-Torn Congo|work=[[MTV]]|date=March 22, 2004|access-date=February 1, 2023|archive-url=https://web.archive.org/web/20040609075026/http://www.mtv.com/news/articles/1485897/03222004/sum_41.jhtml|archive-date=June 9, 2004|url-status=dead}}</ref> There had been a stoppage in fighting for almost a year and a half, yet days after arriving, fighting broke out in [[Bukavu]] near the hotel where the band was staying.<ref name="MTV news">{{cite web|first1=Joe|last1=D'Angelo|first2=Adam|last2=Hootnick|url=http://www.mtv.com/news/articles/1488128/06032004/sum_41.jhtml|title=Sum 41 Caught in Violent Outbreak in Congo|work=[[MTV]]|date=June 3, 2004|access-date=February 1, 2023|archive-url=https://web.archive.org/web/20040605061403/http://www.mtv.com/news/articles/1488128/06032004/sum_41.jhtml|archive-date=June 5, 2004|url-status=dead}}</ref><ref name="Chuck AllMusic">{{cite web|first=Johnny|last=Loftus|url=https://www.allmusic.com/album/chuck-mw0000301542|title=Chuck - Sum 41|work=[[AllMusic]]|access-date=June 20, 2019|archive-url=https://web.archive.org/web/20230415161430/https://www.allmusic.com/album/chuck-mw0000301542|archive-date=April 15, 2023|url-status=live}}</ref> The band waited for the fighting to die down, but it did not.<ref name="knac.com">{{cite web|first=Curt|last=Miller|url=http://www.knac.com/article.asp?ArticleID=16287|title=Metal In Their Veins: An Exclusive Interview with Jason "Cone" McCaslin Of Sum 41|work=KNAC|date=July 22, 2015|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230320214016/http://www.knac.com/article.asp?ArticleID=16287|archive-date=March 20, 2023|url-status=live}}</ref> A [[United Nations|UN]] peacekeeper, Charles "Chuck" Pelletier, called for armoured carriers to take the hotel's occupants out of the hot zone.<ref name="knac.com"/> After nearly twenty hours, the carriers arrived, and the band and forty other civilians were taken to safety.<ref name="knac.com"/>{{Listen|filename=WATB.ogg|title="We're All to Blame"|description=Sample of "[[We're All to Blame]]" from ''[[Chuck (Sum 41 album)|Chuck]]''.<ref name="Chuck AllMusic"/> "We're All to Blame" features a thrash metal sound.<ref>{{cite web|first=Trevor|last=Nicholson|url=https://forgottenunderground.com/2018/07/12/5ish-sum-41-songs-every-guitar-player-should-know/|title=5(ish) Sum 41 Songs Every Guitar Player Should Know|work=Forgotten Underground|date=July 12, 2018|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20190208094840/https://forgottenunderground.com/2018/07/12/5ish-sum-41-songs-every-guitar-player-should-know/|archive-date=February 8, 2019|url-status=dead}}</ref>|format=[[Ogg]]}}

In honor of Pelletier, Sum 41 named its next album ''[[Chuck (Sum 41 album)|Chuck]]''; it was released on October 12, 2004.<ref name="Chuck AllMusic"/><ref>{{cite magazine|url=https://www.billboard.com/bb/reviews/album_article_display.jsp?vnu_content_id=1000682466|title=Chuck : Sum 41 : Review|magazine=[[Billboard (magazine)|Billboard]]|date=October 30, 2004|access-date=January 29, 2022|archive-url=https://web.archive.org/web/20041217201429/https://www.billboard.com/bb/reviews/album_article_display.jsp?vnu_content_id=1000682466|archive-date=December 17, 2004|url-status=dead}}</ref> The album charted at number 10 on the ''Billboard'' 200 chart.<ref name="Chart History">{{cite magazine|url=https://www.billboard.com/artist/sum-41/chart-history/tlp/|title=Sum 41 Chart History|magazine=[[Billboard (magazine)|Billboard]]|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230419190034/https://www.billboard.com/artist/sum-41/chart-history/tlp/|archive-date=April 19, 2023|url-status=live}}</ref> It also peaked at number two on the Canadian Albums chart.<ref name="Canadian Albums">{{cite magazine|url=https://www.billboard.com/artist/sum-41/chart-history/cna/|title=Sum 41 (Canadian Albums)|magazine=[[Billboard (magazine)|Billboard]]|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230407072655/https://www.billboard.com/artist/sum-41/chart-history/cna/|archive-date=April 7, 2023|url-status=live}}</ref> The album received positive reviews,<ref>{{cite web|url=http://music.ign.com/articles/558/558577p1.html|title=Chuck – IGN|work=[[IGN]]|date=October 20, 2004|access-date=September 7, 2011|archive-url=https://web.archive.org/web/20120528014242/http://music.ign.com/articles/558/558577p1.html|archive-date=May 28, 2012|url-status=dead}}</ref><ref>{{cite magazine|url=https://www.billboard.com/bb/reviews/album_article_display.jsp?vnu_content_id=1000682466|title=Chuck : Sum 41 : Review|magazine=[[Billboard (magazine)|Billboard]]|date=October 30, 2004|access-date=January 29, 2022|archive-url=https://web.archive.org/web/20041217201429/https://www.billboard.com/bb/reviews/album_article_display.jsp?vnu_content_id=1000682466|archive-date=2004-12-17|url-status=dead}}</ref> and was certified Platinum in Canada and gold in the United States.<ref>{{cite web|url=http://www.cria.ca/gold/1005_g.php|title=Gold & Platinum Certification&nbsp;– October 2005|publisher=[[Canadian Recording Industry Association]]|access-date=May 11, 2010|archive-url=https://web.archive.org/web/20101122131024/http://cria.ca/gold/1005_g.php|archive-date=November 22, 2010|url-status=dead}}</ref><ref name="riaa">{{cite web|url=https://www.riaa.com/goldandplatinumdata.php?table=SEARCH|title=RIAA Database Search for Sum 41|publisher=[[Recording Industry Association of America]]|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20070626050454/http://www.riaa.com/goldandplatinumdata.php?table=SEARCH|archive-date=June 26, 2007|url-status=dead}}</ref>

The first single from the album was "[[We're All To Blame]]",<ref>{{cite magazine|first=Michael|last=Endelman|url=http://www.ew.com/article/2004/10/04/chuck|title=Chuck|magazine=[[Entertainment Weekly]]|date=October 4, 2004|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230419125918/https://ew.com/article/2004/10/04/chuck/|archive-date=April 19, 2023|url-status=live}}</ref> which peaked at number 10 on the Alternative Airplay chart.<ref name="Alternative Airplay">{{cite magazine|url=https://www.billboard.com/artist/sum-41/chart-history/mrt/|title=Sum 41 Chart History (Alternative Airplay)|magazine=[[Billboard (magazine)|Billboard]]|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230405190255/https://www.billboard.com/artist/sum-41/chart-history/mrt/|archive-date=April 5, 2023|url-status=live}}</ref> It was followed by "[[Pieces (Sum 41 song)|Pieces]]",<ref>{{cite web|first=Joe|last=D'Angelo|url=http://www.mtv.com/news/1493978/sum-41-video-skit-deemed-unsuitable-for-children-band-says-good/|title=Sum 41 Video Skit Deemed Unsuitable For Children — Band Says, 'Good!'|work=[[MTV]]|date=November 19, 2004|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230423163659/https://www.mtv.com/news/7pc745/sum-41-video-skit-deemed-unsuitable-for-children-band-says-good|archive-date=April 23, 2023|url-status=dead}}</ref> which reached the top of the charts in Canada.<ref>{{cite magazine|url=https://worldradiohistory.com/Archive-RandR/2000s/2005/RR-2005-04-08.pdf|title=R&R Canada CHR/Pop Top 30|magazine=[[Radio & Records]]|issue=1601|page=28|date=April 8, 2005|access-date=October 6, 2019}}</ref><ref>{{cite magazine|url=https://worldradiohistory.com/Archive-RandR/2000s/2005/RR-2005-07-01.pdf|title=R&R Canada Hot AC Top 30|magazine=Radio & Records|issue=1613|page=50|date=July 1, 2005|access-date=October 6, 2019}}</ref><ref>{{cite magazine|url=https://worldradiohistory.com/Archive-RandR/2000s/2005/RR-2005-03-25.pdf|title=R&R Canada Rock Top 30|magazine=Radio & Records|issue=1599|page=62|date=March 25, 2005|access-date=October 6, 2019}}</ref> In 2004, the band went on a co-headlining North American Tour with [[Good Charlotte]].<ref name="North American Tour 2004">{{cite web|first=Joe|last=Dangelo|url=https://www.mtv.com/news/1491247/good-charlotte-sum-41-to-embark-on-co-headlining-trek/|title=Good Charlotte, Sum 41 To Embark On Co-Headlining Trek|work=[[MTV]]|date=September 21, 2004|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20220403050135/https://www.mtv.com/news/1491247/good-charlotte-sum-41-to-embark-on-co-headlining-trek/|archive-date=April 3, 2022|url-status=dead}}</ref> The band joined [[Mötley Crüe]] on their Carnival of Sin summer tour as an opening act.<ref name="Carnival of Sin">{{cite web|first=Gil|last=Kaufman|url=https://www.mtv.com/news/1497652/motley-crue-plan-summertime-carnival-of-sin-with-sum-41/|title=Motley Crue Plan Summertime Carnival Of Sin With Sum 41|work=[[MTV]]|date=March 2, 2005|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20220404023443/https://www.mtv.com/news/1497652/motley-crue-plan-summertime-carnival-of-sin-with-sum-41/|archive-date=April 4, 2022|url-status=dead}}</ref>

A documentary of the band's experience in Congo was made into a film called ''[[Rocked: Sum 41 in Congo]]'' and later aired on [[MTV]].<ref name="Rocked 1">{{cite web|first=Helen|last=Chan|url=http://emptylighthouse.com/sum-41-overcoming-worst-preparing-comeback-1252450918|title=Sum 41: Overcoming the Worst, Preparing for a Comeback|work=Empty Lighthouse Magazine|date=June 2, 2015|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230409101154/http://emptylighthouse.com/sum-41-overcoming-worst-preparing-comeback-1252450918|archive-date=April 9, 2023|url-status=live}}</ref><ref name="Rocked 2">{{cite web|url=http://www.chartattack.com/news/2005/11/25/sum-41-congo-experiences-on-new-dvd/|title=Sum 41 Congo Experiences on New DVD|work=Chart Attack|date=November 25, 2005|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20180213080427/http://www.chartattack.com/news/2005/11/25/sum-41-congo-experiences-on-new-dvd/|archive-date=February 13, 2018|url-status=usurped}}</ref><ref name="Rocked 3">{{cite magazine|url=https://www.billboard.com/music/music-news/billboard-bits-sum-41-br-danielson-schematics-60532/|title=Billboard Bits: Sum 41, Br. Danielson, Schematics|magazine=[[Billboard (magazine)|Billboard]]|date=November 28, 2005|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230415160942/https://www.billboard.com/music/music-news/billboard-bits-sum-41-br-danielson-schematics-60532/|archive-date=April 15, 2023|url-status=live}}</ref><ref name="Rocked 4">{{cite web|first=Aubin|last=Paul|url=https://www.punknews.org/article/14644/sum-41-to-release-rocked-sum-41-in-congo-dvd-with-proceeds-to-war-child|title=Sum 41 to release "Rocked: Sum 41 In Congo DVD" with proceeds to War Child|work=Punknews.org|date=November 28, 2005|access-date=February 1, 2023|archive-url=https://web.archive.org/web/20211122093801/https://www.punknews.org/article/14644/sum-41-to-release-rocked-sum-41-in-congo-dvd-with-proceeds-to-war-child|archive-date=November 22, 2021|url-status=live}}</ref> War Child released it on DVD on November 29, 2005, in the United States and Canada.<ref name="Rocked 1"/><ref name="Rocked 2"/><ref name="Rocked 3"/><ref name="Rocked 4"/> Following the album's release, the band went on a tour with [[Good Charlotte]] until 2006.<ref>{{cite magazine|url=https://www.billboard.com/articles/news/66389/good-charlotte-sum-41-teaming-for-tour|title=Good Charlotte, Sum 41 Teaming For Tour|magazine=[[Billboard (magazine)|Billboard]]|date=September 22, 2014|access-date=February 12, 2018|archive-url=https://web.archive.org/web/20141124203353/https://www.billboard.com/articles/news/66389/good-charlotte-sum-41-teaming-for-tour|archive-date=November 24, 2014|url-status=live}}</ref> On December 21, 2005, Sum 41 released a [[live album]], ''[[Happy Live Surprise]]'', in Japan.<ref name="exclaim11">{{cite web|first=Stuart|last=Green|url=http://jam.canoe.ca/Music/2006/03/09/1481647-sun.html|title=Reviews: Sum 41 - 'Go Chuck Yourself'|date=April 2006|access-date=February 1, 2023|archive-url=https://archive.today/20140527184947/http://jam.canoe.ca/Music/2006/03/09/1481647-sun.html|archive-date=May 27, 2014|url-status=usurped}}</ref><ref name="winnipeg13">{{cite web|first=Stuart|last=Green|url=http://exclaim.ca/Reviews/PopAndRock/sum_41-go_chuck_yourself|title=Music: Sum 41 - 'Go Chuck Yourself'|date=April 1, 2006|access-date=February 1, 2023|archive-url=https://web.archive.org/web/20200817155622/http://exclaim.ca/music/article/sum_41-go_chuck_yourself|archive-date=August 17, 2020|url-status=dead}}</ref> The CD contained a full concert recorded live in [[London, Ontario]].<ref name="winnipeg13"/> The same CD was released March 7, 2006, in Canada under the name ''[[Go Chuck Yourself]]''.<ref name="exclaim11"/><ref name="winnipeg13"/> The band played videos before its set that were deemed "unsuitable for children".<ref name="MTV news 2">{{cite web|first=Joe|last=D'Angelo|url=http://www.mtv.com/news/articles/1493978/11192004/sum_41.jhtml|title=Sum 41 Video Skit Deemed Unsuitable For Children&nbsp;– Band Says, 'Good!'|work=[[MTV]]|date=November 19, 2004|access-date=February 1, 2023|archive-url=https://web.archive.org/web/20041208161402/http://www.mtv.com/news/articles/1493978/11192004/sum_41.jhtml|archive-date=December 8, 2004|url-status=dead}}</ref> Controversy arose over some of the videos' violent content.<ref name="MTV news 2"/>

===2006–2008: Baksh's departure and ''Underclass Hero''===
{{Main|Underclass Hero}}
On May 10, 2006, [[Dave Baksh]], via a statement through management, announced that he was leaving Sum 41 to work with his new band, [[Brown Brigade]], which has a more "classic metal" sound.<ref name="Exclaim Gormely"/><ref name="Baksh Departure">{{cite web|first=James|last=Montgomery|url=http://www.mtv.com/news/1531654/sum-41-guitarist-quits-group-to-focus-on-new-metal-band/|title=Sum 41 Guitarist Quits to Focus on New Band|work=[[MTV]]|date=May 12, 2006|access-date=January 31, 2023|archive-url=https://web.archive.org/web/20151016210154/http://www.mtv.com/news/1531654/sum-41-guitarist-quits-group-to-focus-on-new-metal-band/|archive-date=October 16, 2015|url-status=dead}}</ref> Baksh cited "creative differences" as the reason for his departure, but claimed that he was still on good terms with the band.<ref name="Baksh Departure"/>
The next day, Whibley confirmed Baksh's official departure and announced that the band would only replace him with a touring guitarist, who would not have any decision-making power in the band or be in videos, photo shoots, or albums.<ref name="official website 2">{{cite news|first=Deryck|last=Whibley|url=http://www6.islandrecords.com/sum41/www2/bbs/bbs1_7/thread.php?site_num=11&thread_num=14386018&folder_num=23&id=443188337988%20http://www6.islandrecords.com/sum41/www2/bbs/bbs1_7/...read_num=14386018&folder_num=23&id=443188337988|title=Sum 41 Board Message|work=Island Records|date=May 12, 2006|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20090408225827/http://www6.islandrecords.com/sum41/www2/bbs/bbs1_7/thread.php?site_num=11&thread_num=14386018&folder_num=23&id=443188337988%20http://www6.islandrecords.com/sum41/www2/bbs/bbs1_7/...read_num=14386018&folder_num=23&id=443188337988|archive-date=April 8, 2009|url-status=dead}}</ref> The band hired [[Gob (band)|Gob]] frontman and guitarist [[Tom Thacker (musician)|Tom Thacker]] to replace Baksh.<ref name="Exclaim Gormely"/><ref name="official website 2"/>
[[File:Sum 41 live 2008.jpg|thumb|left|230px|Sum 41 playing live at Club Oxygen on March 7, 2008]]

On April 17, 2007, the band released a song on [[iTunes]], "[[March of the Dogs]]".<ref name="March of the Dogs AP">{{cite web|url=http://www.altpress.com/index.php/news/entry/archive_1969|title=New Sum 41 album gets title, release date|work=[[Alternative Press (magazine)|Alternative Press]]|date=April 16, 2007|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20160826061322/http://www.altpress.com/index.php/news/entry/archive_1969|archive-date=August 26, 2016|url-status=dead}}</ref><ref name="George W. Bush">{{cite web|first=James|last=Montgomery|url=https://www.mtv.com/news/h7uyxo/sum-41-kill-president-in-new-song-deryck-whibley-says-its-a-metaphor|title=Sum 41 Kill President In New Song -- Deryck Whibley Says It's 'A Metaphor'|work=[[MTV]]|date=April 23, 2007|access-date=January 31, 2023|archive-url=https://web.archive.org/web/20230223140344/https://www.mtv.com/news/h7uyxo/sum-41-kill-president-in-new-song-deryck-whibley-says-its-a-metaphor|archive-date=February 23, 2023|url-status=dead}}</ref> Whibley was threatened with deportation from the United States for the song, because he metaphorically "killed the [[George W. Bush|president]]" on it.<ref name="George W. Bush"/><ref>{{cite web|author=Sowing|url=https://www.sputnikmusic.com/review/79851/Sum-41-Order-In-Decline/|title=Review: Sum 41 - Order In Decline|work=Sputnikmusic|date=July 19, 2019|access-date=January 31, 2023}}</ref> The band's fourth studio album, ''[[Underclass Hero]]'' was released on July 23, 2007.<ref>{{cite web|first=Kate|last=Sharp|url=https://www.bbc.co.uk/music/release/6vxm/|title=Sum 41 Underclass Hero Review|work=[[BBC]]|access-date=September 27, 2023|archive-url=https://web.archive.org/web/20231012161129/https://www.bbc.co.uk/music/reviews/6vxm/|archive-date=October 12, 2023|url-status=live}}</ref>

The album, backed by the first single and title track, "[[Underclass Hero (song)|Underclass Hero]]", was released on July 24, 2007.<ref name="George W. Bush"/><ref name="March of the Dogs AP"/><ref>{{cite web|first=Stephen Thomas|last=Erlewine|url=https://www.allmusic.com/album/underclass-hero-mw0000584729|title=Sum 41 Underclass Hero|work=[[AllMusic]]|access-date=June 27, 2019|archive-url=https://web.archive.org/web/20160306100928/https://www.allmusic.com/album/underclass-hero-mw0000584729|archive-date=March 6, 2016|url-status=live}}</ref> Despite mixed reviews,<ref>{{cite web|url=https://www.metacritic.com/music/underclass-hero/sum-41|title=Underclass Hero Reviews|website=Metacritic|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230407072655/https://www.metacritic.com/music/underclass-hero/sum-41|archive-date=April 7, 2023|url-status=live}}</ref> the album was a commercial success, debuting at number seven on the [[Billboard 200|''Billboard'' 200]]<ref name="Chart History"/> and at number one on the ''Billboard Rock Albums'' chart, the band's highest US chart position to date.<ref>{{cite magazine|url=https://www.billboard.com/artist/sum-41/chart-history/rck/|title=Sum 41 (Rock Albums)|magazine=[[Billboard (magazine)|Billboard]]|date=October 6, 2007|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230409142352/https://www.billboard.com/artist/sum-41/chart-history/rck/|archive-date=April 9, 2023|url-status=live}}</ref> It also peaked at number one on the Canadian Albums chart<ref name="Canadian Albums"/> and on the ''Alternative Albums'' chart.<ref>{{cite magazine|url=https://www.billboard.com/artist/sum-41/chart-history/alt/|title=Sum 41 (Alternative Albums)|magazine=[[Billboard (magazine)|Billboard]]|date=October 6, 2007|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230409100612/https://www.billboard.com/artist/sum-41/chart-history/alt/|archive-date=April 9, 2023|url-status=live}}</ref> Two more singles were released from the album, "[[Walking Disaster]]"<ref>{{cite web|url=https://www.antimusic.com/news/07/aug/0208.shtml|title=Sum 41 Debut in Top 10|work=antMusic|date=August 2, 2007|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230415160939/https://www.antimusic.com/news/07/aug/0208.shtml|archive-date=April 15, 2023|url-status=live}}</ref> and "[[With Me (Sum 41 song)|With Me]]".<ref>{{cite magazine|url=https://www.billboard.com/artist/sum-41/chart-history/can/|title=Sum 41 Billboard Canadian Hot 100|magazine=[[Billboard (magazine)|Billboard]]|access-date=September 27, 2023|archive-url=https://web.archive.org/web/20231002232358/https://www.billboard.com/artist/sum-41/chart-history/can/|archive-date=October 2, 2023|url-status=live}}</ref> ''Underclass Hero'' was certified Platinum in Canada.<ref>{{cite web|url=http://www.musiccanada.com/GPSearchResult.aspx?st=&ica=False&sa=sum%2041&sl=&smt=0&sat=-1&ssb=Artist|title=Gold and Platinum Search|work=[[Music Canada]]|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20131004214237/http://www.musiccanada.com/GPSearchResult.aspx?st=&ica=False&sa=Sum%2041&sl=&smt=0&sat=-1&ssb=Artist|archive-date=October 4, 2013|url-status=dead}}</ref> On September 15, 2007, the band headlined the [[House of Blues]] with [[Yellowcard]].<ref name="Yellowcard">{{cite web|first=Joe|last=Tone|url=https://www.clevescene.com/music/pop-punk-paradise-sum-41-and-yellowcard-at-house-of-blues-cleveland-1558511|title=Pop-Punk Paradise: Sum 41 and Yellowcard at House of Blues Cleveland|work=[[Cleveland Scene]]|date=September 13, 2007|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230415162441/https://www.clevescene.com/music/pop-punk-paradise-sum-41-and-yellowcard-at-house-of-blues-cleveland-1558511|archive-date=April 15, 2023|url-status=live}}</ref>

In October 2007, the band began the ''Strength in Numbers Tour'', a tour of Canada with Canadian band [[Finger Eleven]]; [[Die Mannequin]] opened each of Sum 41's shows.<ref name="chartattack">{{cite web|first=Michelle|last=Singerman|url=http://www.chartattack.com/news/2007/10/23/deryck-whibleys-weak-back-ends-strength-in-numbers-tour-early/|title=Deryck Whibley's Weak Back Ends Strength in Numbers Tour Early|work=Chart Attack|date=October 23, 2007|access-date=February 6, 2009|archive-url=https://web.archive.org/web/20150923222508/http://www.chartattack.com/news/2007/10/23/deryck-whibleys-weak-back-ends-strength-in-numbers-tour-early/|archive-date=September 23, 2015|url-status=usurped}}</ref> During the tour, Whibley sustained a [[herniated disk]].<ref name="chartattack"/> As a result, the group cancelled the rest of its shows.<ref name="chartattack"/> After Whibley recovered from his injury, the band continued the ''Underclass Hero'' tour in March 2008 and toured until early July, when the group began preparation for its next album.<ref>{{cite web|first=Lindsey|last=Rivait|url=http://pastthepages.ca/080319/feature.html|title=Sum 41: the Underclass Heroes bounce back|work=The Lance|date=March 19, 2008|access-date=August 17, 2008|archive-url=https://web.archive.org/web/20080326231650/http://pastthepages.ca/080319/feature.html|archive-date=March 26, 2008|url-status=dead}}</ref>

Sum 41 released a greatest hits album in Japan titled ''[[All the Good Shit|8 Years of Blood, Sake and Tears]]'' in November 2008.<ref name="8 Years of Blood, Sake and Tears">{{cite web|first=Josiah|last=Hughes|url=http://www.exclaim.ca/articles/generalarticlesynopsfullart.aspx?csid1=127&csid2=844&fid1=34690|title=Sum 41 Release Japan-Only Greatest Hits Album|work=[[Exclaim!]]|date=November 6, 2008|access-date=November 7, 2008|archive-url=https://archive.today/20120729113116/http://www.exclaim.ca/articles/generalarticlesynopsfullart.aspx?csid1=127&csid2=844&fid1=34690|archive-date=July 29, 2012|url-status=dead}}</ref> The album included a previously unreleased song, "Always", and a DVD, which contains each of the band's music videos.<ref name="8 Years of Blood, Sake and Tears"/> On March 17, the band released the worldwide version of the album, titled ''[[All the Good Shit]]''.<ref>{{cite web|url=http://www.chartattack.com/news/2009/02/06/sum-41-hits-collection-goes-worldwide/|title=Sum 41 Hits Collection Goes Worldwide|work=[[Chart (magazine)|ChartAttack.com]]|date=February 6, 2009|access-date=February 6, 2009|archive-url=https://web.archive.org/web/20130408101252/http://www.chartattack.com/news/2009/02/06/sum-41-hits-collection-goes-worldwide/|archive-date=April 8, 2013|url-status=usurped}}</ref><ref>{{cite web|first=Stephen Thomas|last=Erlewine|url=https://www.allmusic.com/album/all-the-good-sh-14-solid-gold-hits-2000-2008-mw0000812657|title=Sum 41 All the Good Sh**: 14 Solid Gold Hits 2000-2008|work=[[AllMusic]]|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20201026063314/https://www.allmusic.com/album/all-the-good-sh-14-solid-gold-hits-2000-2008-mw0000812657|archive-date=October 26, 2020|url-status=live}}</ref>

===2009–2012: Thacker's official arrival and ''Screaming Bloody Murder''===
{{Main|Screaming Bloody Murder}}
In July 2009, the band was an opening act for [[The Offspring]] on their Shit is Fucked Up Tour.<ref name="Shit is Fucked Up Tour">{{cite web|first=Alex|last=Young|url=https://consequence.net/2009/03/the-offspring-thinks-this-s-is-fed-up/|title=The Offspring thinks this S*** Is F***ed Up|work=[[Consequence (publication)|Consequence]]|date=March 25, 2009|access-date=December 26, 2023|archive-url=https://web.archive.org/web/20220404023442/https://consequence.net/2009/03/the-offspring-thinks-this-s-is-fed-up/|archive-date=April 4, 2022|url-status=live}}</ref> Drummer Steve Jocz confirmed that Tom Thacker was now an official member of Sum 41, and would take part in the writing and recording.<ref>{{cite web|url=http://www.islandrecords.com/site/artist_newsinfo.php?uf_item_id=2-1734744&uf_system_id=0&artist_id=259 |title=Sum 41 official website @ IslandRecords.com&nbsp;– Home|publisher=Islandrecords.com|access-date=March 9, 2010|archive-url=https://web.archive.org/web/20090724152620/http://www.islandrecords.com/site/artist_newsinfo.php?uf_item_id=2-1734744&uf_system_id=0&artist_id=259|archive-date=July 24, 2009|url-status=dead}}</ref> On November 5, 2009, Whibley posted a blog on the band's [[MySpace]] page announcing [[Gil Norton]] as the producer of the band's upcoming album, also saying that 20 songs were already written for the album.<ref>{{cite web|url=http://blogs.myspace.com/index.cfm?fuseaction=blog.view&friendId=3091855&blogId=517226745 |title=UPDATE FROM DERYCK&nbsp;– MySpace-blog {{pipe}} van Sum 41 |publisher=Blogs.myspace.com |access-date=March 9, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20091221100623/http://blogs.myspace.com/index.cfm?fuseaction=blog.view&friendId=3091855&blogId=517226745 |archive-date=December 21, 2009 }}</ref> In an interview with [[Tom Thacker (singer)|Tom Thacker]], some working titles for songs for the new album were confirmed, including "Panic Attack", "Jessica Kill" and "Like Everyone Else".<ref>{{cite web|url=http://theresnosolution.com/forum/viewtopic.php?f=4&t=11621&view=unread#unread|title=Tom's Interview – Sum 41 France|work=Theresnosolution|access-date=March 9, 2010|archive-url=https://web.archive.org/web/20110717025542/http://theresnosolution.com/forum/viewtopic.php?f=4&t=11621&view=unread#unread|archive-date=July 17, 2011|url-status=dead}}</ref> Pre-production for the new album took 13 days in December 2009, with the band officially entering the studio to begin recording at [[Perfect Sound Studios]] on January 26, 2010. The new studio album, titled ''[[Screaming Bloody Murder (Sum 41 album)|Screaming Bloody Murder]]'',<ref name="CTPOST2010">{{cite news|first=Scott|last=Gargan|url=http://www.ctpost.com/entertainment/article/Sum-41-now-veterans-of-Warped-Tour-568185.php|title=Sum 41 now veterans of Warped Tour|work=[[Connecticut Post]]|date=July 7, 2010|access-date=July 21, 2010|archive-url=https://web.archive.org/web/20100719002709/http://www.ctpost.com/entertainment/article/Sum-41-now-veterans-of-Warped-Tour-568185.php|archive-date=July 19, 2010|url-status=live}}</ref> was expected for a late 2010 release, but was delayed until early 2011.<ref name="canoe-rumors">{{cite web|first=Cédric|last=Bélanger|url=http://www.canoe.com/divertissement/musique/nouvelles/2010/08/03/14907881-jdq.html|title=Le groupe remet les pendules à l'heure|work=[[Canadian Online Explorer]]|language=fr|date=August 3, 2010|access-date=August 5, 2010|archive-url=https://archive.today/20120721232728/http://www.canoe.com/divertissement/musique/nouvelles/2010/08/03/14907881-jdq.html|archive-date=July 21, 2012|url-status=dead}}</ref> The band finished recording on June 24, 2010, just before joining the 2010 Warped Tour. While the group was on the tour, the new album entered the [[post-production]] stages of [[Audio mixing (recorded music)|mixing]] and [[Audio mastering|mastering]].<ref name="canoe-rumors"/> A new song called "Skumfuk" was leaked online on July 6, 2010.<ref>{{cite web|url=http://www.chartattack.com/news/87071/i-read-the-news-today-for-july-7-2010|title=I Read The News Today...|work=[[Chart (magazine)|Chart Attack]]|date=July 7, 2010|access-date=July 21, 2010|archive-url=https://web.archive.org/web/20100710051355/http://www.chartattack.com/news/87071/i-read-the-news-today-for-july-7-2010|archive-date=July 10, 2010 |url-status=usurped}}</ref> In an interview with [[Canadian Online Explorer|Canoe.ca]], Steve Jocz said that while producer Gil Norton was originally hired to engineer the new album, he was only around for a week and Sum 41 self-produced the record.<ref name="canoe-rumors"/> From October to November 2010, the band headlined the {{ill|Eastpak Antidote Tour|de|Eastpak Antidote Tour|vertical-align=sup|lt=|WD=}}.<ref name="Eastpak Antidote Tour">{{cite magazine|url=https://www.rocksound.tv/news/read/sum-41-to-headline-the-eastpak-antidote-tour|title=Sum 41 To Headline The Eastpak Antidote Tour|magazine=[[Rock Sound]]|date=August 9, 2010|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20160305223556/https://www.rocksound.tv/news/read/sum-41-to-headline-the-eastpak-antidote-tour|archive-date=March 5, 2016|url-status=dead}}</ref><ref name="Eastpak Antidote Tour2">{{cite web|first=Robin|last=Murray|url=https://www.clashmusic.com/live/eastpak-antidote-tour/|title=Eastpak Antidote Tour|work=[[Clash (magazine)|Clash]]|date=August 13, 2010|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230130043130/https://www.clashmusic.com/live/eastpak-antidote-tour/|archive-date=January 30, 2023|url-status=live}}</ref>

[[File:Sum 41 at the West Palm Beach Warped Tour 2010.jpg|thumb|left|Sum 41 performing on [[Warped Tour|Vans Warped Tour]] in 2010.]]
The first single from the album, "[[Screaming Bloody Murder (song)|Screaming Bloody Murder]]", was released on February 7, 2011, in the United States.<ref>{{cite web|first=Jon|last=Ableson|url=http://www.alterthepress.com/2011/01/new-sum-41-single-to-hit-us-radio-next.html|title=New Sum 41 Single To Hit US Radio Next Month|work=Alter the Press!|date=January 8, 2011|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20121108143119/http://www.alterthepress.com/2011/01/new-sum-41-single-to-hit-us-radio-next.html|archive-date=November 8, 2012|url-status=live}}</ref><ref>{{cite web|url=http://absolutepunk.net/showthread.php?t=2111782|title=Sum 41 Screams Bloody Murder&nbsp;– News Article|work=[[AbsolutePunk]]|access-date=January 29, 2023|archive-url=https://archive.today/20120710140149/http://absolutepunk.net/showthread.php?t=2111782|archive-date=July 10, 2012|url-status=dead}}</ref> On February 28, 2011, a stream of "Blood in My Eyes", another new song from the album, was released for free listening on Alternative Press.<ref>{{cite magazine|first=Scott|last=Heisel|url=http://www.altpress.com/features/entry/exclusive_stream_sum_41s_blood_in_my_eyes/|title=New Sum 41 Song|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=February 28, 2011|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20110305094418/http://www.altpress.com/features/entry/exclusive_stream_sum_41s_blood_in_my_eyes/|archive-date=March 5, 2011|url-status=dead}}</ref> The album ''[[Screaming Bloody Murder]]'' was released on March 29, 2011.<ref>{{cite web|first=Scott|last=Heisel|url=https://www.digitalspy.com/music/a302667/sum-41-to-release-dark-new-album/|title=Sum 41 to release 'dark' new album|work=[[Digital Spy]]|date=February 8, 2011|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230130043120/https://www.digitalspy.com/music/a302667/sum-41-to-release-dark-new-album/|archive-date=January 30, 2023|url-status=live}}</ref><ref>{{cite web|first=Mala|last=Mortensa|url=https://www.altpress.com/rock-albums-released-in-2011/|title=20 albums you won't believe are turning 10 in 2021|work=[[Alternative Press (magazine)|Alternative Press]]|date=January 5, 2021|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20230324083002/https://www.altpress.com/rock-albums-released-in-2011/|archive-date=March 24, 2023|url-status=live}}</ref><ref>{{cite web|first=Alex|last=Hudson|url=https://exclaim.ca/music/article/sum_41_gear_up_for_screaming_bloody_murder|title=Sum 41 Gear Up for Screaming Bloody Murder|work=[[Exclaim!]]|date=January 13, 2011|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230130043117/https://exclaim.ca/music/article/sum_41_gear_up_for_screaming_bloody_murder|archive-date=January 30, 2023|url-status=live}}</ref> On May 28, 2011, Sum 41 performed a live set for ''[[Guitar Center]] Sessions'' on [[DirecTV]].<ref name="Guitar Center Sessions">{{cite web|first=Lauren|last=Wolman|url=https://www.broadwayworld.com/bwwtv/article/Sum-41-Kicks-Off-New-Run-Of-Guitar-Center-Sessions-Episodes-On-DIRECTV-528-20110528|title=Sum 41 Kicks-Off New Run Of Guitar Center Sessions Episodes On DIRECTV, 5/28|work=[[BroadwayWorld]]|date=May 28, 2011|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230130043117/https://www.broadwayworld.com/bwwtv/article/Sum-41-Kicks-Off-New-Run-Of-Guitar-Center-Sessions-Episodes-On-DIRECTV-528-20110528|archive-date=January 30, 2023|url-status=live}}</ref> The episode included an interview with program host [[Nic Harcourt]].<ref name="Guitar Center Sessions"/>

"[[Baby You Don't Wanna Know]]" was released as the album's second single.<ref>{{cite web|first=Bryne|last=Yancey|url=https://www.punknews.org/article/43799/videos-sum-41-baby-you-dont-wanna-know|title=Sum 41: "Baby You Don't Wanna Know"|work=Punknews.org|date=August 5, 2011|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230130043120/https://www.punknews.org/article/43799/videos-sum-41-baby-you-dont-wanna-know|archive-date=January 30, 2023|url-status=live}}</ref> A music video was also produced for the first single, "Screaming Bloody Murder", but it was left unreleased due to its content and difficulties with executives of the band.<ref>{{cite web|url=http://theresnosolution.com/forum/viewtopic.php?f=4&t=11601&start=12320#p346779|title=Sum41/SBM Discussion!|work=Theresnosolution|access-date=July 24, 2011|archive-url=https://web.archive.org/web/20111001131700/http://theresnosolution.com/forum/viewtopic.php?f=4&t=11601&start=12320#p346779|archive-date=October 1, 2011|url-status=dead}}</ref>

On August 9, 2011, Sum 41 released the live album ''[[Live at the House of Blues, Cleveland 9.15.07]]'' – a live recording of a show that took place on September 15, 2007, in [[Cleveland, Ohio]], while the band was touring its previous album ''[[Underclass Hero]]''.<ref>{{cite web|url=https://music.apple.com/us/album/live-at-the-house-of-blues-cleveland-9-15-07/1442874922 |title=Live at the House of Blues, Cleveland, 9.15.07 by Sum 41 |publisher=[[iTunes]] |date=August 9, 2011 |access-date=October 19, 2011}}</ref> A week later when the band was touring the US as part of the [[Vans Warped Tour]], they were forced once again to cancel all remaining dates, when Whibley re-injured his back after playing three shows.<ref name="broken back">{{cite magazine|first=Michele|last=Bird|url=https://www.altpress.com/sum_41_cancel_south_american_tour/|title=Sum 41 cancel South American tour|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=August 31, 2011|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230130043119/https://www.altpress.com/sum_41_cancel_south_american_tour/|archive-date=January 30, 2023|url-status=live}}</ref> It was announced on the band's official website that they would be postponing indefinitely all upcoming tour dates for 2011 while Whibley underwent treatment.<ref name="broken back"/> In 2011, Sum 41 was nominated for a [[Grammy Award for Best Hard Rock/Metal Performance]] for the song "Blood in My Eyes", but lost to the [[Foo Fighters]].<ref name="grammy awards 2012">{{cite web|url=https://www.hollywoodreporter.com/news/music-news/grammy-awards-2012-winners-whitney-houston-death-adele-289778/|title=Grammy Awards 2012: Complete Winners And Nominees List|work=[[The Hollywood Reporter]]|date=February 12, 2012|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230607050000/https://www.hollywoodreporter.com/news/music-news/grammy-awards-2012-winners-whitney-houston-death-adele-289778/|archive-date=June 7, 2023|url-status=live}}</ref><ref name="grammy awards 2012 2">{{cite web|first=Graham|last=Hartmann|url=https://loudwire.com/sum-41-best-hard-rock-metal-nomination-other-bizarre-grammy-moments/|title=Sum 41's Best Hard Rock / Metal Nomination + Other Bizarre Grammy Moments|work=[[Loudwire]]|date=December 1, 2011|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230419232509/https://loudwire.com/sum-41-best-hard-rock-metal-nomination-other-bizarre-grammy-moments/|archive-date=April 19, 2023|url-status=live}}</ref><ref name="grammy awards 2012 3">{{cite web|url=https://www.grammy.com/grammys/artists/sum-41/7959|title=Grammy Award Results for Sum 41 Bizarre Grammy Moments|work=[[The Recording Academy]]|date=November 23, 2020|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230419125919/https://www.grammy.com/artists/sum-41/7959|archive-date=April 19, 2023|url-status=dead}}</ref>

In February 2012, the band shot a music video for the song "[[Blood in My Eyes]]", the third single from the album, with director Michael Maxxis in [[Los Angeles]].<ref>{{Cite magazine|first=Michele|last=Bird|url=https://www.altpress.com/news/sum_41_to_shoot_blood_in_my_eyes_video/|title=Sum 41 to shoot "Blood In My Eyes" video|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=February 24, 2012|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20220402212554/https://www.altpress.com/news/sum_41_to_shoot_blood_in_my_eyes_video/|archive-date=April 2, 2022|url-status=live}}</ref> It was released officially released on September 10, 2012.<ref>{{Cite magazine|first=Michele|last=Bird|url=https://www.altpress.com/news/sum_41_to_release_blood_in_my_eyes_video/|title=Sum 41 to release "Blood In My Eyes" video|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=September 10, 2012|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230419125918/https://www.altpress.com/sum_41_to_release_blood_in_my_eyes_video/|archive-date=April 19, 2023|url-status=live}}</ref>

From November to December 2012, the band undertook the ''Does This Look Infected?'' 10th Anniversary Tour, touring the United States to celebrate the album's release in 2002.<ref name="DTLI? 10th Anniversary">{{cite web|first=Graham|last=Hartmann|url=https://loudwire.com/sum-41-to-embark-on-does-this-look-infected-10th-anniversary-tour/|title=Sum 41 to Embark on 'Does This Look Infected?' 10th Anniversary Tour|work=[[Loudwire]]|date=September 12, 2012|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230419232513/https://loudwire.com/sum-41-to-embark-on-does-this-look-infected-10th-anniversary-tour/|archive-date=April 19, 2023|url-status=live}}</ref><ref name="DTLI? 10th Anniversary2">{{cite web|first=John|last=Flynn|url=https://www.punknews.org/article/48838/tours-sum-41-announce-does-this-look-infected-10th-anniversary-tour|title=Sum 41 announce 'Does This Look Infected?' 10th anniversary tour|work=Punknews.org|date=September 10, 2012|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230130043120/https://www.punknews.org/article/48838/tours-sum-41-announce-does-this-look-infected-10th-anniversary-tour|archive-date=January 30, 2023|url-status=live}}</ref><ref name="DTLI? 10th Anniversary3">{{cite web|first=Graham|last=Hartmann|url=https://loudwire.com/sum-41-10th-anniversary-does-this-look-infected-nyc-show/|title=Sum 41 Celebrate 10th Anniversary of 'Does This Look Infected?' With Nostalgic NYC Show|work=[[Loudwire]]|date=November 16, 2012|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230130043117/https://loudwire.com/sum-41-10th-anniversary-does-this-look-infected-nyc-show/|archive-date=January 30, 2023|url-status=live}}</ref>

On November 26, 2012, the band members revealed that they were taking a break from touring in 2013 to begin work on a new record.<ref>{{cite web|url=http://www.absolutepunk.net/showthread.php?t=2963472|title=Sum 41 – 11.26.12 – Interview|work=[[AbsolutePunk]]|access-date=January 29, 2023|archive-url=https://archive.today/20130221043959/http://www.absolutepunk.net/showthread.php?t=2963472|archive-date=February 21, 2013|url-status=dead}}</ref>

===2013–2018: Continued lineup changes and ''13 Voices''===
{{Main|13 Voices}}
{{multiple image
| align     = right
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| footer    = In 2015, [[Dave Baksh]] (top) rejoined Sum 41, while [[Frank Zummo]] (bottom) was recruited as the band's new drummer.
| image1    = Sum 41 - 2017154162825 2017-06-03 Rock am Ring - Sven - 1D X II - 0969 - AK8I8811.jpg
| width1    = 200
| image2    = Sum 41 - 2017154163140 2017-06-03 Rock am Ring - Sven - 1D X II - 1010 - AK8I8852.jpg
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}}
From March to April 2013, the band co-headlined the Dead Silence Tour with [[Billy Talent]].<ref name="Dead Silence Tour">{{cite web|url=https://stitchedsound.com/billy-talent-announce-dead-silence-tour-2013/|title=Billy Talent announce Dead Silence tour 2013|work=Stitched Sound|date=November 30, 2012|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230415160940/https://stitchedsound.com/billy-talent-announce-dead-silence-tour-2013/|archive-date=April 15, 2023|url-status=live}}</ref> On April 18, 2013, drummer Jocz announced he would be leaving the band on his official [[Facebook]] page,<ref name="Jocz">{{cite web|first=Dan|last=Stubbs|url=https://www.nme.com/news/music/sum-41-10-1250167|title=Drummer Steve Jocz quits Sum 41|work=[[NME]]|date=April 18, 2013|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20200807215630/https://www.nme.com/news/music/sum-41-10-1250167|archive-date=August 7, 2020|url-status=live}}</ref><ref>{{cite web|first=Aubin|last=Paul|url=https://www.punknews.org/article/51319/sum-41s-steve-stevo-jocz-leaves-the-band|title=Sum 41's Steve "Stevo" Jocz leaves the band|work=Punknews.org|date=April 18, 2013|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20130421010311/https://www.punknews.org/article/51319/sum-41s-steve-stevo-jocz-leaves-the-band|archive-date=April 21, 2013|url-status=live}}</ref><ref>{{cite web|first=Graham|last=Hartmann|url=https://loudwire.com/sum-41-drummer-steve-jocz-leaves-band/|title=Sum 41 Drummer Steve Jocz Leaves Band|work=[[Loudwire]]|date=April 18, 2013|access-date=January 28, 2023|archive-url=https://web.archive.org/web/20170619234623/https://loudwire.com/sum-41-drummer-steve-jocz-leaves-band/|archive-date=June 19, 2017|url-status=live}}</ref> leaving Whibley as the sole founding member of the band.<ref>{{cite web|url=http://www.89xradio.com/Media/Podcast-List/89X-Backstage-Access/Jay-Hud-talks-with-Deryck-from-Sum-41|title=Jay Hud talks with Deryck from Sum 41|work=89xradio|date=November 1, 2016|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20160303204117/http://www.89xradio.com/Media/Podcast-List/89X-Backstage-Access/Jay-Hud-talks-with-Deryck-from-Sum-41|archive-date=March 3, 2016|url-status=dead}}</ref>

On May 16, 2014, Deryck Whibley posted on his website, explaining that he had liver and kidney failure due to excessive drinking. He also said that he had some ideas for new songs, and that the band would be soon starting to make a new album.<ref>{{cite magazine|first=Miriam|last=Coleman|url=https://www.rollingstone.com/music/news/sum-41s-deryck-whibley-says-alcoholism-nearly-killed-him-20140517|title=Sum 41's Deryck Whibley Says Alcoholism Nearly Killed Him|magazine=[[Rolling Stone]]|date=May 17, 2014|access-date=January 28, 2023|archive-url=https://web.archive.org/web/20140520095812/https://www.rollingstone.com/music/news/sum-41s-deryck-whibley-says-alcoholism-nearly-killed-him-20140517|archive-date=May 20, 2014|url-status=dead}}</ref> On June 9, 2014, Whibley said on his Facebook page that he was working on new Sum 41 music out of his home studio to get ready to record some new tunes.<ref>{{cite magazine|url=http://www.altpress.com/news/entry/sum_41s_deryck_whibley_writing_new_music|title=Sum 41's Deryck Whibley writing new music – News – Alternative Press|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=June 9, 2014|access-date=January 28, 2023|archive-url=https://web.archive.org/web/20150218001908/http://www.altpress.com/news/entry/sum_41s_deryck_whibley_writing_new_music|archive-date=February 18, 2015|url-status=dead}}</ref>

On July 9, 2015, the band launched a [[PledgeMusic]] campaign for its comeback album.<ref>{{cite magazine|first=Tyler|last=Sharp|url=http://www.altpress.com/news/entry/sum_41_to_release_comeback_album|title=Sum 41 to release comeback album|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=July 9, 2015|access-date=January 28, 2023|archive-url=https://web.archive.org/web/20150711173936/http://www.altpress.com/news/entry/sum_41_to_release_comeback_album|archive-date=July 11, 2015|url-status=dead}}</ref> On July 23, 2015, the band played its comeback show at the Alternative Press Awards, which featured former lead guitarist Dave Baksh, joining the band on stage nine years after his departure.<ref>{{cite web|first=Chad|last=Childers|url=https://loudwire.com/sum-41-welcome-back-dave-brownsound-baksh/|title=Sum 41 Welcome Back Guitarist Dave 'Brownsound' Baksh|work=[[Loudwire]]|date=July 23, 2015|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20170622041519/https://loudwire.com/sum-41-welcome-back-dave-brownsound-baksh/|archive-date=June 22, 2017|url-status=live}}</ref><ref>{{cite magazine|url=https://www.upsetmagazine.com/news/dave-brownsound-baksh-rejoins-sum-41|title=Dave "Brownsound" Baksh rejoins Sum 41|magazine=Upset Magazine|date=July 23, 2015|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20220328051729/https://www.upsetmagazine.com/news/dave-brownsound-baksh-rejoins-sum-41|archive-date=March 28, 2022|url-status=dead}}</ref> The band's set also featured [[Darryl McDaniels|DMC]] as guest.<ref name="DMC">{{cite magazine|first=Kika|last=Chatterjee|url=http://www.altpress.com/news/entry/new_sum_41_music_the_record_is_almost_done|title=New Sum 41 music: "The record is almost done"|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=January 2, 2016|access-date=January 28, 2023|archive-url=https://web.archive.org/web/20160304194638/http://www.altpress.com/news/entry/new_sum_41_music_the_record_is_almost_done|archive-date=March 4, 2016|url-status=dead}}</ref> It also introduced [[Frank Zummo]] from [[Street Drum Corps]] as the new drummer.<ref>{{cite magazine|first=Phil|last=Hood|url=https://drummagazine.com/frank-zummo-talks-about-joining-sum-41-and-starting-new-drum-clinic-tour/|title=Frank Zummo Talks About Joining Sum 41 And Starting New Drum Clinic Tour|magazine=Drum Magazine|date=July 19, 2018|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20200125154442/https://drummagazine.com/frank-zummo-talks-about-joining-sum-41-and-starting-new-drum-clinic-tour/|archive-date=January 25, 2020|url-status=live}}</ref> Sum 41 confirmed Baksh's official return to the band on August 14, 2015.<ref name="DMC"/> On December 26, 2015, Sum 41 teased two new songs on their [[Instagram]] profile.<ref name="DMC"/>

The band performed on the 2016 [[Warped Tour]].<ref name="2016 Warped Tour">{{cite magazine|first=Andy|last=Biddulph|url=http://www.rocksound.tv/news/read/heres-the-line-up-for-this-summers-vans-warped-tour|title=See The Full Vans Warped Tour Line-Up|magazine=[[Rock Sound]]|date=March 22, 2016|access-date=March 22, 2016|archive-url=https://web.archive.org/web/20160322235807/http://www.rocksound.tv/news/read/heres-the-line-up-for-this-summers-vans-warped-tour|archive-date=March 22, 2016|url-status=dead}}</ref> On May 11, 2016, the group announced its signing to [[Hopeless Records]].<ref>{{cite magazine|url=https://www.altpress.com/sum_41_sign_to_hopeless_records/|title=Sum 41 sign to Hopeless Records|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=May 10, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230419141739/https://www.altpress.com/sum_41_sign_to_hopeless_records/|archive-date=April 19, 2023|url-status=live}}</ref><ref>{{cite web|first=Ben|last=Tipple|url=https://www.punktastic.com/news/sum-41-sign-to-hopeless-records/|title=Sum 41 Sign To Hopeless Records|work=Punktastic|date=May 11, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230419033108/https://www.punktastic.com/news/sum-41-sign-to-hopeless-records/|archive-date=April 19, 2023|url-status=live}}</ref> The band announced on June 6, 2016 that their sixth album would be called ''[[13 Voices]]'' and would be released on October 7, 2016.<ref name="13 Voices Release">{{cite magazine|url=https://www.altpress.com/sum_41_announce_comeback_album_13_voices/|title=Sum 41 announce comeback album, '13 Voices'|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=June 6, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230419141716/https://www.altpress.com/sum_41_announce_comeback_album_13_voices/|archive-date=April 19, 2023|url-status=live}}</ref> That same day, they also revealed album's track list and cover art.<ref name="13 Voices Release"/> The first song from the upcoming album, "[[Fake My Own Death]]", was released on June 28, 2016, through [[Hopeless Records]]' official [[YouTube]] channel, along with a music video for the song.<ref>{{cite web|first=Graham|last=Hartmann|url=https://loudwire.com/sum-41-fake-my-own-death-video/|title=Sum 41 Roar Back With 'Fake My Own Death' Video|work=[[Loudwire]]|date=June 29, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230128202944/https://loudwire.com/sum-41-fake-my-own-death-video/|archive-date=January 28, 2023|url-status=live}}</ref><ref>{{cite magazine|first=Jessica|last=Goodman|url=https://ew.com/article/2016/06/29/sum-41-fake-my-own-death/|title=Sum 41: Fake My Own Death released|magazine=[[Entertainment Weekly]]|date=June 29, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230415160939/https://ew.com/article/2016/06/29/sum-41-fake-my-own-death/|archive-date=April 15, 2023|url-status=live}}</ref> The song was performed on ''[[The Late Show with Stephen Colbert]]'' on October 3, 2016.<ref>{{cite web|url=https://alterock.net/sum-41-late-show/|title=Watch Sum 41 Perform 'Fake My Own Death' on Stephen Colbert's The Late Show|work=Alterock|date=October 4, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230415160940/https://alterock.net/sum-41-late-show/|archive-date=April 15, 2023|url-status=live}}</ref> The album's first official single, "[[War (Sum 41 song)|War]]", was released on August 25, 2016.<ref>{{cite web|first=Brent|last=Furdyk|url=https://etcanada.com/news/162108/sum-41-releases-deeply-personal-new-single-music-video-war/|title=Sum 41 Releases Deeply Personal New Single, Music Video: 'War'|work=ET Canada|date=August 25, 2016|access-date=January 28, 2023|archive-url=https://web.archive.org/web/20160826145945/http://etcanada.com/news/162108/sum-41-releases-deeply-personal-new-single-music-video-war/|archive-date=August 26, 2016|url-status=dead}}</ref><ref>{{cite web|first=Chad|last=Childers|url=https://loudwire.com/sum-41-war-video/|title=Sum 41 Revisit Past Wreckage With 'War' Video|work=[[Loudwire]]|date=August 22, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230415160939/https://loudwire.com/sum-41-war-video/|archive-date=April 15, 2023|url-status=live}}</ref> On September 29, 2016, the track "[[God Save Us All (Death to Pop)]]" was officially released (along with a live music video).<ref>{{cite web|url=https://www.kerrang.com/sum-41-release-god-save-us-all-death-to-pop|title=Sum 41 Release God Save Us All (Death To Pop)|work=[[Kerrang!]]|date=September 29, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230415160940/https://www.kerrang.com/sum-41-release-god-save-us-all-death-to-pop|archive-date=April 15, 2023|url-status=live}}</ref><ref>{{cite web|first=Ricky|last=Frankel|url=https://www.punknews.org/article/61997/videos-sum-41-god-save-us-all-death-to-pop|title=Sum 41: "God Save Us All (Death To Pop)"|work=Punknews.org|date=September 26, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230128202943/https://www.punknews.org/article/61997/videos-sum-41-god-save-us-all-death-to-pop|archive-date=January 28, 2023|url-status=live}}</ref> [[Independent Music Companies Association|IMPALA]] awarded the album with a double gold award for 150,000 sold copies across Europe.<ref>{{cite web|url=https://www.impalamusic.org/content/sum-41-impala-doublegold-award|title=Sum 41 - Impala Double Gold Award|work=Impala Music|access-date=March 28, 2022|archive-url=https://web.archive.org/web/20181028225707/https://www.impalamusic.org/content/sum-41-impala-doublegold-award|archive-date=October 28, 2018}}</ref><ref>{{cite web|url=https://www.impalamusic.org/node/11|title=Awards|publisher=Impala Music|access-date=March 28, 2022|archive-url=https://web.archive.org/web/20181028225707/https://www.impalamusic.org/content/sum-41-impala-doublegold-award|archive-date=October 28, 2018|url-status=dead}}</ref>

On September 29, 2016, it was announced that the band would be headlining the [[Kerrang!#Kerrang! Tour|2016 Kerrang! Tour]].<ref name="2016 Kerrang! Tour">{{cite web|url=https://planetradio.co.uk/kerrang/entertainment/music/kerrang-tour-2016-headliner-dates-announced-tickets-sale-now/|title=Kerrang! Tour 2016 Headliner and Dates Announced - Tickets On Sale Now!|work=Kerrang! Radio|date=September 25, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20170623200957/https://planetradio.co.uk/kerrang/entertainment/music/kerrang-tour-2016-headliner-dates-announced-tickets-sale-now/|archive-date=June 23, 2017|url-status=live}}</ref><ref>{{cite web|first=Alexandra|last=Pollard|url=https://gigwise.com/news/103582/kerrang-uk-2016-frank-carter-joins-sum-41-on-line-up-buy-tickets|title=The Kerrang! Tour 2016 just got even bigger|work=[[Gigwise]]|date=November 4, 2015|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230128202943/https://gigwise.com/news/103582/kerrang-uk-2016-frank-carter-joins-sum-41-on-line-up-buy-tickets|archive-date=January 28, 2023|url-status=dead}}</ref> From October 2016 to August 2017, the band went on their [[Don't Call It a Sum-Back Tour]] in support of 13 Voices. The band played nearly 100 shows in the Americas,<ref name="North America DCIASBT">Sources for tour dates in North America:
*{{cite web|first=Stef|last=Lach|url=https://www.loudersound.com/news/sum-41-announce-north-american-autumn-tour|title=Sum 41 announce North American autumn tour|work=Louder Sound|date=August 9, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230415160939/https://www.loudersound.com/news/sum-41-announce-north-american-autumn-tour|archive-date=April 15, 2023|url-status=live}}
*{{cite web|first=Francisco|last=Rendon|url=http://www.pollstar.com/news_article.aspx?ID=826159|title=Here Comes Some Sum 41|website=Pollstar|date=August 8, 2016|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20160809131420/http://www.pollstar.com/news_article.aspx?ID=826159|archive-date=August 9, 2016|url-status=dead}}</ref> Europe,<ref name="Europe DCIASBT">Sources for tour dates in Europe, first leg:
*{{cite web|first=John|last=Earls|url=https://www.nme.com/news/music/sum-41-28-1189962|title=Sum 41 announce tour for '13 Voices' album|work=[[NME]]|date=October 10, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230415160939/https://www.nme.com/news/music/sum-41-28-1189962|archive-date=April 15, 2023|url-status=live}}
*{{cite web|first=Loïc|last=Cousin|url=http://www.bordeaux-gazette.com/les-sum-41-mettent-le-feu-a-talence.html|title=Les Sum 41 mettent le feu à Talence|language=French|trans-title=The Sum 41 set fire to Talence|work=Bordeaux Gazette|date=March 11, 2017|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20220524063826/http://www.bordeaux-gazette.com/les-sum-41-mettent-le-feu-a-talence.html|archive-date=May 24, 2022|url-status=live}}
*{{cite web|first=Lucie|last=Valais|url=http://www.linternaute.com/musique/magazine/1334661-sum-41-retrouvez-toutes-les-dates-de-leur-tournee-en-france-en-2017/|title=Sum 41 : retrouvez toutes les dates de leur tournée en France en 2017|language=French|trans-title=Sum 41: find all the dates of their tour in France in 2017|website=[[:fr:L'Internaute|L'Internaute]]|publisher=[[:fr:CCM Benchmark|CCM Benchmark]]|date=October 10, 2016|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20180116004324/http://www.linternaute.com/musique/magazine/1334661-sum-41-retrouvez-toutes-les-dates-de-leur-tournee-en-france-en-2017/|archive-date=January 16, 2018|url-status=live}}</ref> and Asia.<ref name="Asia DCIASBT">{{cite web|first=Hidzir|last=Junaini|url=https://www.bandwagon.asia/articles/sum-41-are-back-and-they-re-heading-to-singapore|title=Sum 41 are back and they're heading to Singapore|work=Bandwagon Media|date=July 20, 2017|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20180115185437/https://www.bandwagon.asia/articles/sum-41-are-back-and-they-re-heading-to-singapore|archive-date=January 15, 2018|url-status=live}}</ref> The band invited fans to record a music video for "[[Goddamn I'm Dead Again]]" that was released on May 3, 2017.<ref>{{cite web|url=https://newnoisemagazine.com/sum-41-rocks-fans-new-music-video-goddamn-im-dead/|title=Sum 41 Rocks Out With Fans in New Music Video for "Goddamn I'm Dead|work=Noise Magazine|date=May 3, 2017|access-date=January 28, 2023|archive-url=https://web.archive.org/web/20170508151643/https://newnoisemagazine.com/sum-41-rocks-fans-new-music-video-goddamn-im-dead/|archive-date=May 8, 2017|url-status=dead}}</ref> In April 2017, the band co-headlined the 2017 Canadian Tour with [[Papa Roach]].<ref name="2017 Canadian Tour">{{cite web|url=https://www.monsterenergy.com/pe/es/news/papa-roach-unveil-title-and-details-of-their-new-album|title=Papa Roach unveil title and details of their new album|work=Monster Energy|date=March 27, 2017|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230415160939/https://www.monsterenergy.com/pe/es/news/papa-roach-unveil-title-and-details-of-their-new-album|archive-date=April 15, 2023|url-status=live}}</ref> From April to May 2017, the band co-headlined the We Will Detonate Tour with [[Pierce the Veil]].<ref name="We Will Detonate Tour">{{cite magazine|url=https://newnoisemagazine.com/sum-41-pierce-veil-announce-spring-tour/|title=Sum 41 and Pierce The Veil Announce Spring Tour with Emarosa and Chapel|magazine=New Noise Magazine|date=March 1, 2017|access-date=January 28, 2023|archive-url=https://web.archive.org/web/20220403051640/https://newnoisemagazine.com/sum-41-pierce-veil-announce-spring-tour/|archive-date=April 3, 2022|url-status=dead}}</ref> The group embarked on a 15th anniversary tour of ''Does This Look Infected'' in 2018.<ref name="Colburn">{{cite web|first=Randall|last=Colburn|url=https://consequence.net/2018/02/sum-41-announce-does-this-look-infected-15th-anniversary-tour-of-north-america/|title=Sum 41 announce Does This Look Infected? 15th anniversary tour of North America|work=[[Consequence (publication)|Consequence]]|date=February 13, 2018|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20220328054253/https://consequence.net/2018/02/sum-41-announce-does-this-look-infected-15th-anniversary-tour-of-north-america/|archive-date=March 28, 2022|url-status=live}}</ref><ref>{{cite magazine|first=Maggie|last=Dickman|url=https://www.altpress.com/sum_41_does_this_look_infected_anniversary_tour_super_whatevr_support/|title=Sum 41 announce additional support for 'Does This Look Infected?' anniversary tour|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=April 11, 2018|access-date=December 27, 2023|archive-url=https://web.archive.org/web/20230201043502/https://www.altpress.com/sum_41_does_this_look_infected_anniversary_tour_super_whatevr_support/|archive-date=February 1, 2023|url-status=live}}</ref>

===2019–2021: ''Order in Decline''===
{{Main|Order in Decline}}
From April to May 2019, the band embarked on an intimate tour called the No Personal Space Tour.<ref name="No Personal Space Tour">{{cite web|first=Lauryn|last=Schaffner|url=https://loudwire.com/sum-41-2019-no-personal-space-tour/|title=Sum 41 Announce Intimate 2019 'No Personal Space' Tour|work=[[Loudwire]]|date=March 11, 2019|access-date=December 19, 2023|archive-url=https://web.archive.org/web/20230601153444/https://loudwire.com/sum-41-2019-no-personal-space-tour/|archive-date=June 1, 2023|url-status=live}}</ref> In April 2019, the band announced via social media its return with new music.<ref name="BBM Order in Decline">{{cite web|url=http://www.blabbermouth.net/news/sum-41-returns-with-heaviest-and-most-aggressive-album-to-date-order-in-decline/|title=Sum 41 Returns With 'Heaviest And Most Aggressive' Album To Date, 'Order In Decline'|work=[[Blabbermouth.net]]|date=April 24, 2019|access-date=December 19, 2023|archive-url=https://web.archive.org/web/20230602221737/http://www.blabbermouth.net/news/sum-41-returns-with-heaviest-and-most-aggressive-album-to-date-order-in-decline/|archive-date=June 2, 2023|url-status=live}}</ref><ref name="cosOrder in Decline">{{cite web|first=Spencer|last=Kaufman|url=https://consequence.net/2019/04/sum-41-new-album-order-in-decline-out-for-blood-single/|title=Sum 41 announce new album, Order in Decline, release "Out for Blood": Stream|work=[[Consequence (publication)|Consequence]]|date=April 24, 2019|access-date=December 19, 2023|archive-url=https://web.archive.org/web/20230923085039/https://consequence.net/2019/04/sum-41-new-album-order-in-decline-out-for-blood-single/|archive-date=September 23, 2023|url-status=live}}</ref> On April 24, 2019 they released the single, "[[Out for Blood (Sum 41 song)|Out for Blood]]" through [[Hopeless Records]].<ref name="cosOrder in Decline"/><ref>{{cite web|first=Graham|last=Hartmann|url=https://loudwire.com/sum-41-order-in-decline-album-out-for-blood/|title=Sum 41 Announce 'Order in Decline' Album, Unveil New Track 'Out for Blood'|work=[[Loudwire]]|date=April 24, 2019|access-date=December 19, 2023|archive-url=https://web.archive.org/web/20230128050204/https://loudwire.com/sum-41-order-in-decline-album-out-for-blood/|archive-date=January 28, 2023|url-status=live}}</ref> The same day, the band also announced their seventh studio album, ''[[Order in Decline]]'', with a set release date of July 19, 2019.<ref name="BBM Order in Decline"/><ref name="cosOrder in Decline"/><ref>{{cite web|first=Paul|last=Brown|url=https://wallofsoundau.com/2019/04/25/sum-41-drop-new-song-out-for-blood-from-forthcoming-album-order-in-decline/|title=Sum 41 drop new song 'Out For Blood' from forthcoming album Order in Decline|work=Wall of Sound|date=April 24, 2019|access-date=December 19, 2023|archive-url=https://web.archive.org/web/20230709193945/https://wallofsoundau.com/2019/04/25/sum-41-drop-new-song-out-for-blood-from-forthcoming-album-order-in-decline/|archive-date=July 9, 2023|url-status=live}}</ref>

The second single from the album "A Death in the Family" was released along with a music video on June 11, 2019.<ref>{{cite magazine|first=Rachel|last=Campbell|url=https://www.altpress.com/sum-41-a-death-in-the-family-video/|title=Sum 41 go back in time for "A Death In The Family" video|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=June 11, 2019|access-date=December 19, 2023|archive-url=https://web.archive.org/web/20230128050153/https://www.altpress.com/sum-41-a-death-in-the-family-video/|archive-date=January 28, 2023|url-status=live}}</ref><ref>{{cite web|first=Calum|last=Slingerland|url=https://exclaim.ca/music/article/sum_41_share_new_song_a_death_in_the_family|title=Sum 41 Share New Song "A Death in the Family"|work=[[Exclaim!]]|date=June 11, 2019|access-date=December 19, 2023|archive-url=https://web.archive.org/web/20230419141715/https://exclaim.ca/music/article/sum_41_share_new_song_a_death_in_the_family|archive-date=April 19, 2023|url-status=live}}</ref> On June 18, 2019, "[[Never There (Sum 41 song)|Never There]]" was released as the third single, along with a video.<ref name="exclaim never there">{{cite web|first=Josiah|last=Hughes|url=https://exclaim.ca/amparticle/sum_41_share_somber_piano_ballad_for_single_parents_everywhere|title=Sum 41 Share Sombre Piano Ballad for Single Parents Everywhere|work=[[Exclaim!]]|date=June 18, 2019|access-date=July 18, 2019|archive-url=https://web.archive.org/web/20230415160941/https://exclaim.ca/amparticle/sum_41_share_somber_piano_ballad_for_single_parents_everywhere|archive-date=April 15, 2023|url-status=live}}</ref><ref>{{cite magazine|first=Collin|last=Goeman|url=https://www.altpress.com/news/sum-41-new-song-never-there/|title=Sum 41 unplug for touching acoustic single "Never There"|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=June 18, 2019|access-date=June 18, 2019|archive-url=https://web.archive.org/web/20221023065602/https://www.altpress.com/sum-41-new-song-never-there/|archive-date=October 23, 2022|url-status=live}}</ref> On July 8, 2019, the band released "45 (A Matter of Time)" as the fourth single, along with a video.<ref>{{cite web|url=http://www.blabbermouth.net/news/sum-41-drops-protest-filled-music-video-for-45-a-matter-of-time/|title=Sum 41 Drops Protest-Filled Music Video for '45 (A Matter Of Time)'|work=[[Blabbermouth.net]]|date=July 8, 2019|access-date=July 8, 2019|archive-url=https://web.archive.org/web/20230530144033/https://blabbermouth.net/news/sum-41-drops-protest-filled-music-video-for-45-a-matter-of-time|archive-date=May 30, 2023|url-status=live}}</ref><ref>{{cite magazine|first=Marvin|last=Dotiyal|url=https://www.altpress.com/sum-41-45-a-matter-of-time-video/|title=Sum 41 protest the government in "45 (A Matter Of Time)" video|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=July 8, 2019|access-date=January 27, 2023|archive-url=https://web.archive.org/web/20230128050203/https://www.altpress.com/sum-41-45-a-matter-of-time-video/|archive-date=January 28, 2023|url-status=live}}</ref> On July 18, 2019, the band performed a medley of [[Metallica]] songs including "[[For Whom the Bell Tolls (Metallica song)|For Whom The Bell Tolls]]", "[[Enter Sandman]]", and "[[Master of Puppets (song)|Master Of Puppets]]" at [[Sirius XM]] studios.<ref>{{cite web|first=Greg|last=Kennelty|url=https://metalinjection.net/video/watch-sum-41-play-a-killer-metallica-medley-live-in-the-studio|title=Watch Sum 41 Play A Killer Metallica Medley Live In The Studio|work=Metal Injection|date=July 20, 2019|access-date=January 30, 2023|archive-url=https://web.archive.org/web/20230130072841/https://metalinjection.net/video/watch-sum-41-play-a-killer-metallica-medley-live-in-the-studio|archive-date=January 30, 2023|url-status=live}}</ref><ref>{{cite web|url=https://blabbermouth.net/news/watch-sum-41-perform-metallica-medley-at-siriusxm-studios|title=Watch Sum 41 Perform Metallica Medley At SiriusXM Studios|work=[[Blabbermouth.net]]|date=July 18, 2019|access-date=January 30, 2023|archive-url=https://web.archive.org/web/20230130072836/https://blabbermouth.net/news/watch-sum-41-perform-metallica-medley-at-siriusxm-studios|archive-date=January 30, 2023|url-status=live}}</ref><ref>{{cite magazine|first=Alex|last=Darus|url=https://www.altpress.com/sum-41-metallica-medley/|title=Sum 41 honor Metallica with 5-minute medley jam session|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=July 18, 2019|access-date=January 30, 2023|archive-url=https://web.archive.org/web/20230130072840/https://www.altpress.com/sum-41-metallica-medley/|archive-date=January 30, 2023|url-status=live}}</ref>

In September 2019, the band started a North American tour called the ''Order in Decline Tour''.<ref name="Order in Decline Tour">{{cite magazine|first=Glenn|last=Rowley|url=https://www.billboard.com/music/rock/sum-41-chuck-anniversary-order-in-decline-tour-8530356/|title=Sum 41 Celebrating 15th Anniversary of 'Chuck' With Order in Decline Tour|magazine=[[Billboard (magazine)|Billboard]]|date=September 18, 2019|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230208082352/https://www.billboard.com/music/rock/sum-41-chuck-anniversary-order-in-decline-tour-8530356/|archive-date=February 8, 2023|url-status=live}}</ref><ref name="Order in Decline Tour2">{{cite magazine|first=Glenn|last=Rowley|url=https://www.altpress.com/sum-41-fall-tour-2019/|title=Sum 41 announce fall tour in support of 'Order In Decline'|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=July 29, 2019|access-date=January 27, 2023|archive-url=https://web.archive.org/web/20230128050205/https://www.altpress.com/sum-41-fall-tour-2019/|archive-date=January 28, 2023|url-status=live}}</ref> On top of supporting ''Order in Decline'', the tour was also done in support of the 15th Anniversary of their studio album ''Chuck''.<ref name="Order in Decline Tour"/><ref name="15th Anniversary Chuck">{{cite web|url=https://www.kerrang.com/sum-41-to-celebrate-15th-anniversary-of-chuck-on-upcoming-tour|title=Sum 41 To Celebrate 15th Anniversary Of Chuck On Upcoming Tour|work=[[Kerrang!]]|date=September 19, 2019|access-date=January 27, 2023|archive-url=https://web.archive.org/web/20230128050205/https://www.kerrang.com/sum-41-to-celebrate-15th-anniversary-of-chuck-on-upcoming-tour|archive-date=January 28, 2023|url-status=live}}</ref> From November to December 2019, the band went on a co-headlining tour with [[The Offspring]].<ref name="co-headlining tour The Offspring">{{cite web|first=Chad|last=Childers|url=https://loudwire.com/the-offspring-sum-41-2019-canadian-tour/|title=The Offspring + Sum 41 Announce Co-Headline Tour|work=[[Loudwire]]|date=August 19, 2019|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20220404023442/https://loudwire.com/the-offspring-sum-41-2019-canadian-tour/|archive-date=April 4, 2022|url-status=live}}</ref><ref name="co-headlining tour The Offspring2">{{cite web|url=https://www.kerrang.com/the-offspring-and-sum-41-have-announced-a-co-headline-tour|title=The Offspring And Sum 41 Have Announced A Co-Headline Tour|work=[[Kerrang!]]|date=August 20, 2019|access-date=January 27, 2023|archive-url=https://web.archive.org/web/20230320093528/https://www.kerrang.com/the-offspring-and-sum-41-have-announced-a-co-headline-tour|archive-date=March 20, 2023|url-status=live}}</ref> On May 28, 2021, the band released a version of "Catching Fire" featuring [[Nothing,Nowhere]], along with a music video.<ref>{{cite web|first=Frankie|last=Torok|url=https://newnoisemagazine.com/news-sum-41-drop-reimagined-version-of-catching-fire-feat-nothingnowhere/|title=News: Sum 41 Drop Reimagined Version of 'Catching Fire' Feat. nothing,nowhere|work=New Noise Magazine|date=June 2, 2021|access-date=January 27, 2023|archive-url=https://web.archive.org/web/20210602203104/https://newnoisemagazine.com/news-sum-41-drop-reimagined-version-of-catching-fire-feat-nothingnowhere/|archive-date=June 2, 2021|url-status=live}}</ref><ref>{{cite web|first=Greta|last=Brereton|url=https://www.nme.com/news/music/sum-41-team-up-with-nothing-nowhere-for-powerful-catching-fire-rework-2951288|title=Sum 41 team up with nothing, nowhere for powerful 'Catching Fire' rework|work=[[NME]]|date=May 30, 2021|access-date=January 27, 2023|archive-url=https://web.archive.org/web/20230228081745/https://www.nme.com/news/music/sum-41-team-up-with-nothing-nowhere-for-powerful-catching-fire-rework-2951288|archive-date=February 28, 2023|url-status=live}}</ref><ref>{{cite web|first=Tamara|last=May|url=https://wallofsoundau.com/2021/05/28/sum-41-unveil-catching-fire-with-nothing-nowhere/|title=Sum 41 Unveil 'Catching Fire' with Nothing, Nowhere|work=Wall of Sound|date=May 28, 2021|access-date=May 30, 2021|archive-url=https://web.archive.org/web/20230225102923/https://wallofsoundau.com/2021/05/28/sum-41-unveil-catching-fire-with-nothing-nowhere/|archive-date=February 25, 2023|url-status=live}}</ref>

===2022–2025: ''Heaven :x: Hell'', final tour, Canadian Music Hall of Fame induction, and disbandment===
{{Main|Heaven :x: Hell}}
[[File:Sum 41 - 2023155152603 2023-06-04 Rock am Ring - Sven - 1D X MK II - 0257 - AK8I8513.jpg|thumb|left|280px|Sum 41 performing at [[Rock am Ring and Rock im Park|Rock im Park]] in 2023]]
On February 22, 2022, the band announced a U.S. tour with [[Simple Plan]] called the ''Blame Canada'' tour that ran from April to August 2022.<ref name="Blame Canada">{{cite web|url=https://blabbermouth.net/news/sum-41-and-simple-plan-announce-blame-canada-u-s-tour/|title=Sum 41 And Simple Plan Announce 'Blame Canada' Spring/Summer 2022 U.S. Tour|work=[[Blabbermouth.net]]|date=February 22, 2022|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20230318001104/https://blabbermouth.net/news/sum-41-and-simple-plan-announce-blame-canada-u-s-tour/|archive-date=March 18, 2023|url-status=live}}</ref><ref name="Blame Canada 2">{{cite magazine|first=Taylor|last=Linzinmeir|url=https://www.altpress.com/news/simple-plan-sum-41-blame-canada-tour-dates/|title=Simple Plan and Sum 41 announce U.S. co-headlining Blame Canada tour|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=February 22, 2022|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20220403050949/https://www.altpress.com/news/simple-plan-sum-41-blame-canada-tour-dates/|archive-date=April 3, 2022|url-status=live}}</ref><ref name="Blame Canada 3">{{cite web|first=Matt|last=Bobkin|url=https://exclaim.ca/music/article/sum_41_and_simple_plans_blame_canada_tour_is_skipping_canada|title=Sum 41 and Simple Plan's Blame Canada Tour Is Skipping Canada|work=[[Exclaim!]]|date=February 22, 2022|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20230202033304/https://exclaim.ca/music/article/sum_41_and_simple_plans_blame_canada_tour_is_skipping_canada|archive-date=February 2, 2023|url-status=live}}</ref>

On March 23, 2022, the band announced their eighth studio album, ''[[Heaven :x: Hell]]'', a double album.<ref name="Heaven and Hell">{{cite web|url=https://www.blabbermouth.net/news/sum-41-announces-heaven-and-hell-double-album/|title=Sum 41 Announces 'Heaven And Hell' Double Album|work=[[Blabbermouth.net]]|date=March 23, 2022|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20220416004733/https://www.blabbermouth.net/news/sum-41-announces-heaven-and-hell-double-album/|archive-date=April 16, 2022|url-status=live}}</ref><ref name="Heaven and Hell 2">{{cite magazine|first=Sam|last=Roche|url=https://www.guitarworld.com/news/sum-41-heaven-and-hell|title=Sum 41 announce half-punk, half-metal double album, Heaven and Hell|magazine=[[Guitar World]]|date=March 24, 2022|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20220404163809/https://www.guitarworld.com/news/sum-41-heaven-and-hell|archive-date=April 4, 2022|url-status=live}}</ref><ref name="Heaven and Hell 3">{{cite web|first=Rich|last=Hobson|url=https://www.loudersound.com/news/sum-41-are-releasing-a-metalpop-punk-double-album|title=Sum 41 are releasing a metal/pop-punk double album|work=Louder Sound|date=March 25, 2022|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20220404163747/https://www.loudersound.com/news/sum-41-are-releasing-a-metalpop-punk-double-album|archive-date=April 4, 2022|url-status=live}}</ref><ref name="Heaven and Hell 4">{{cite web|first=Greg|last=Kennelty|url=https://metalinjection.net/upcoming-releases/sum-41s-new-album-is-somewhat-of-a-nod-to-black-sabbath|title=Sum 41's New Album Is "Somewhat Of A Nod To Black Sabbath"|work=Metal Injection|date=April 6, 2022|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20230920212102/https://metalinjection.net/upcoming-releases/sum-41s-new-album-is-somewhat-of-a-nod-to-black-sabbath|archive-date=September 20, 2023|url-status=live}}</ref> ''Heaven'' will return to the pop punk sound of the band's early career while ''Hell'' is a continuation of the band's more recent heavier metal sound.<ref name="Heaven and Hell"/><ref name="Heaven and Hell 2"/><ref name="Heaven and Hell 3"/><ref name="Heaven and Hell 4"/>

On October 8, 2022, during their ''Does This Look All Killer No Filler'' Tour, Sum 41 performed at the [[Unipol Arena]] in [[Bologna]], Italy, drawing over 14,000 attendees, the band's largest concert ever held in Europe.<ref>{{cite news|url=https://bologna.repubblica.it/cronaca/2022/10/09/news/sorpresa_il_punk_e_vivo_trionfo_sum41_a_bologna_il_miglior_pubblico_mai_avuto-369251858/|title=Sorpresa, il punk è vivo: trionfo Sum41 a Bologna. "Il miglior pubblico mai avuto"|newspaper=[[la Repubblica]]|date=October 9, 2022|access-date=November 20, 2024|archive-url=https://web.archive.org/web/20230629013026/https://bologna.repubblica.it/cronaca/2022/10/09/news/sorpresa_il_punk_e_vivo_trionfo_sum41_a_bologna_il_miglior_pubblico_mai_avuto-369251858/|archive-date=June 29, 2023|url-status=live|language=it}}</ref>

On February 22, 2023, it was announced that the band would be playing at [[When We Were Young (festival)|When We Were Young]] on October 22, 2023.<ref>{{cite web|first=Joe|last=DiVita|url=https://loudwire.com/when-we-were-young-festival-2023-lineup-green-day-blink-182/|title=When We Were Young Festival Adds Second 2023 Date|work=[[Loudwire]]|date=February 22, 2023|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20230402022351/https://loudwire.com/when-we-were-young-festival-2023-lineup-green-day-blink-182/|archive-date=April 2, 2023|url-status=live}}</ref><ref>{{cite web|first=Alex|last=Young|url=https://consequence.net/2023/02/blink-182-and-green-day-to-headline-when-we-were-young-fest-2023/|title=Blink-182 and Green Day to Headline When We Were Young Fest 2023 [Updated]|work=[[Consequence (publication)|Consequence]]|date=February 22, 2023|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20230302050049/https://consequence.net/2023/02/blink-182-and-green-day-to-headline-when-we-were-young-fest-2023/|archive-date=March 2, 2023|url-status=live}}</ref> On May 8, 2023, the band announced it would be disbanding following the release of ''Heaven :x: Hell'' and a worldwide headlining tour.<ref>{{cite web|first=Chris|last=Deville|url=https://www.stereogum.com/2222995/sum-41-breaking-up/news/|title=Sum 41 Are Calling It Quits|work=[[Stereogum]]|date=May 8, 2023|access-date=December 14, 2023|archive-url=https://web.archive.org/web/20230606053039/https://www.stereogum.com/2222995/sum-41-breaking-up/news/|archive-date=June 6, 2023|url-status=live}}</ref><ref>{{cite web|first=Philip|last=Trapp|url=https://loudwire.com/sum-41-break-up-announce-disbandment/|title=Sum 41 Announce That They Are Breaking Up|work=[[Loudwire]]|date=May 8, 2023|access-date=December 14, 2023|archive-url=https://web.archive.org/web/20230608061538/https://loudwire.com/sum-41-break-up-announce-disbandment/|archive-date=June 8, 2023|url-status=live}}</ref>

On September 19, 2023, it was announced that Whibley was hospitalized for [[COVID-19]],<ref>{{cite web |last=Whibley |first=Deryck |title=I'm back! |url=https://www.instagram.com/p/CyL1odoR1Xb/ |via=[[Instagram]] |access-date=November 11, 2023 |date=October 9, 2023 |quote=Of course I tested for COVID, and sure enough, I had COVID}}</ref> and [[pneumonia]], which led to the risk of [[heart failure]].<ref>{{cite magazine|first=Emlyn|last=Travis|url=https://ew.com/music/sum-41-deryck-whibley-hospitalized-pneumonia-risk-of-heart-failure/|title=Sum 41's Deryck Whibley hospitalized for pneumonia and at risk of heart failure, wife says|magazine=[[Entertainment Weekly]]|date=September 16, 2023|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20231002232534/https://ew.com/music/sum-41-deryck-whibley-hospitalized-pneumonia-risk-of-heart-failure/|archive-date=October 2, 2023|url-status=live}}</ref><ref>{{cite web|first=Tom|last=Tapp|url=https://deadline.com/2023/09/sum-41-deryck-whibley-hospitalized-1235548695/|title=Sum 41 Lead Singer Deryck Whibley Hospitalized Thursday With Pneumonia, Now Recovering At Home|work=[[Deadline Hollywood|Deadline]]|date=September 16, 2023|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20230920052717/https://deadline.com/2023/09/sum-41-deryck-whibley-hospitalized-1235548695/|archive-date=September 20, 2023|url-status=live}}</ref> The next day, it was announced that he was responding well to his treatments and was discharged from the hospital.<ref>{{cite web|first=Chad|last=Childers|url=https://loudwire.com/sum-41-deryck-whibley-hospitalized-pneumonia-2023/|title=Sum 41's Deryck Whibley Discharged From Hospital After Treatment for Pneumonia|work=[[Loudwire]]|date=September 18, 2023|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20231002232200/https://loudwire.com/sum-41-deryck-whibley-hospitalized-pneumonia-2023/|archive-date=October 2, 2023|url-status=live}}</ref> Despite being discharged from the hospital, Whibley stated that he was "not out of the woods yet" but is "staying positive".<ref>{{cite magazine|first=Kirsty|last=Hatcher|url=https://people.com/sum-41-deryck-whibley-health-update-pneumonia-hospital-7972141|title=Sum 41's Deryck Whibley Discharged From Hospital After Treatment for Pneumonia|magazine=[[People (magazine)|People]]|date=September 20, 2023|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20231002232344/https://people.com/sum-41-deryck-whibley-health-update-pneumonia-hospital-7972141|archive-date=October 2, 2023|url-status=live}}</ref><ref>{{cite magazine|first=Gil|last=Kaufman|url=https://www.billboard.com/music/rock/sum-41-deryck-whibley-health-update-pneumonia-hospitalization-1235416429/|title=Sum 41's Deryck Whibley Gives Health Update After Scary Pneumonia Hospitalization: 'Not Out of the Woods Yet'|magazine=[[Billboard (magazine)|Billboard]]|date=September 20, 2023|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20231001090055/https://www.billboard.com/music/rock/sum-41-deryck-whibley-health-update-pneumonia-hospitalization-1235416429/|archive-date=October 1, 2023|url-status=live}}</ref> On September 24, the band launched a Laylo website, hinting fans that "Something is coming..."<ref>{{cite web|url=https://laylo.com/sum41|title=Sum 41|website=Laylo|access-date=September 24, 2023}}</ref>

The first single of the album, titled "[[Landmines (song)|Landmines]]", was released on September 27, 2023, along with a music video. The song is a return to the pop-punk sound of the band's early career, meaning it will be part of the ''Heaven'' side on the upcoming album. The band also announced that they signed with [[Rise Records]].<ref>{{cite web|first=Megan|last=LaPierre|url=https://exclaim.ca/music/article/sum_41_announce_new_single_landmines_coming_this_week|title=Sum 41 Announce New Single "Landmines" Coming This Week|work=[[Exclaim!]]|date=September 25, 2023|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20231101012220/https://exclaim.ca/music/article/sum_41_announce_new_single_landmines_coming_this_week|archive-date=November 1, 2023|url-status=live}}</ref><ref>{{cite web|url=https://blabbermouth.net/news/sum-41-announces-new-single-landmines|title=Sum 41 Announces New Single "Landmines"|work=[[Blabbermouth.net]]|date=September 25, 2023|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20231004184325/https://blabbermouth.net/news/sum-41-announces-new-single-landmines|archive-date=October 4, 2023|url-status=live}}</ref> The second single, "Rise Up", was released on December 12, 2023, along with a music video.<ref name="Rise Up">{{cite web|first=Ali|last=Shutler|url=https://www.nme.com/news/music/sum-41-tell-us-about-aggressive-final-album-heaven-x-hell-its-the-perfect-way-to-go-out-3557006|title=Sum 41 tell us about "aggressive" final album ''Heaven :x: Hell'': "It's the perfect way to go out"|work=[[NME]]|date=December 12, 2023|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20231212145120/https://www.nme.com/news/music/sum-41-heaven-x-hell-deryck-whibley-new-album-interview-life-death-rise-up-3557006|archive-date=December 12, 2023|url-status=live}}</ref><ref name="Rise Up2">{{cite web|url=https://blabbermouth.net/news/sum-41-announces-details-of-final-double-album-heaven-x-hell|title=Sum 41 Announces Details Of Final Double Album ''Heaven :x: Hell''|work=[[Blabbermouth.net]]|date=December 12, 2023|access-date=December 18, 2023|archive-url=https://web.archive.org/web/20231212145117/https://blabbermouth.net/news/sum-41-announces-details-of-final-double-album-heaven-x-hell|archive-date=December 12, 2023|url-status=live}}</ref> The song is in the style of the band's more recent heavier metal sound, meaning it will be part of the ''Hell'' side on the upcoming album.<ref name="Rise Up"/><ref name="Rise Up2"/> The album was released on March 29, 2024.<ref name="Rise Up"/><ref name="Rise Up2"/>

On January 16, 2024, the band announced dates for their [[Tour of the Setting Sum|final tour]], with their last show taking place on January 30, 2025 at [[Scotiabank Arena]] in [[Toronto]].<ref>{{cite magazine|first=Sadie|last=Bell|url=https://people.com/sum-41-announces-final-concerts-tour-of-the-setting-sum-dates-tickets-8430575|title=Sum 41 Announces Final Tour Dates and Last-Ever Show Ahead of Their Separation as a Band|magazine=[[People (magazine)|People]]|date=January 16, 2024|access-date=February 11, 2024|archive-url=https://web.archive.org/web/20240118014344/https://people.com/sum-41-announces-final-concerts-tour-of-the-setting-sum-dates-tickets-8430575|archive-date=January 18, 2024|url-status=live}}</ref><ref name="sumfinaltour">{{cite web|url=https://blabbermouth.net/news/sum-41-announces-final-headlining-world-tour-tour-of-the-setting-sum|title=Sum 41 Announces Final Headlining World Tour 'Tour Of The Setting Sum'|work=[[Blabbermouth.net]]|date=January 16, 2024|access-date=January 16, 2024|archive-url=https://web.archive.org/web/20240116154556/https://blabbermouth.net/news/sum-41-announces-final-headlining-world-tour-tour-of-the-setting-sum|archive-date=January 16, 2024|url-status=live}}</ref> The band played "Landmines" on ''[[Jimmy Kimmel Live!]]'' on February 8, 2024.<ref>{{cite web|first=Spencer|last=Kaufman|url=https://consequence.net/2024/02/sum-41-landmines-jimmy-kimmel-live/|title=Sum 41 Perform New Single "Landmines" on Jimmy Kimmel Live: Watch|work=[[Consequence (publication)|Consequence]]|date=February 9, 2024|access-date=February 11, 2024|archive-url=https://web.archive.org/web/20240210021806/https://consequence.net/2024/02/sum-41-landmines-jimmy-kimmel-live/|archive-date=February 10, 2024|url-status=live}}</ref><ref>{{cite web|url=https://blabbermouth.net/news/watch-sum-41-performs-landmines-on-jimmy-kimmel-live|title=Watch: Sum 41 Performs 'Landmines' On 'Jimmy Kimmel Live!'|work=[[Blabbermouth.net]]|date=February 9, 2024|access-date=February 11, 2024|archive-url=https://web.archive.org/web/20240210025125/https://blabbermouth.net/news/watch-sum-41-performs-landmines-on-jimmy-kimmel-live|archive-date=February 10, 2024|url-status=live}}</ref> On February 22, 2024, the band released "Waiting on a Twist of Fate" as the album's third single.<ref>{{cite magazine|first=Amanda|last=Hatfield|url=https://www.altpress.com/sum-41-waiting-on-a-twist-of-fate-video-watch/|title=Sum 41 share "Waiting On A Twist of Fate" from final album Heaven x Hell|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=February 22, 2024|access-date=April 1, 2024|archive-url=https://web.archive.org/web/20240307151525/https://www.altpress.com/sum-41-waiting-on-a-twist-of-fate-video-watch/|archive-date=March 7, 2024|url-status=live}}</ref><ref>{{cite web|first=Michael|last=Major|url=https://www.broadwayworld.com/bwwmusic/article/Sum-41-Unleash-New-Single-Waiting-On-A-Twist-Of-Fate-20240222|title=Sum 41 Unleash New Single 'Waiting On A Twist Of Fate'|work=[[BroadwayWorld]]|date=February 22, 2024|access-date=April 1, 2024|archive-url=https://web.archive.org/web/20240222215105/https://www.broadwayworld.com/bwwmusic/article/Sum-41-Unleash-New-Single-Waiting-On-A-Twist-Of-Fate-20240222|archive-date=February 22, 2024|url-status=live}}</ref> A music video for "Dopamine" was released on March 29, 2024, the same day as the album.<ref>{{cite magazine|url=https://heavymag.com.au/sum-41-drop-new-album-release-single-dopamine/|title=Sum 41 Drop New Album, release Single 'Dopamine'|magazine=Heavy Mag|date=March 29, 2024|access-date=March 29, 2024|archive-url=https://web.archive.org/web/20240601055957/https://heavymag.com.au/sum-41-drop-new-album-release-single-dopamine/|archive-date=June 1, 2024|url-status=live}}</ref>

In a 2025 interview with The Canadian Press for Sum 41's final Canadian tour dates, McCaslin and Baksh said they learned of the group's disbandment through an email sent by Whibley to all of the members in early 2023.<ref name="Canadian Press 2025">{{cite web|first=David|last=Friend|url=https://www.thecanadianpressnews.ca/entertainment/i-guess-i-thought-wed-never-end-sum-41-on-coming-to-terms-with-their/article_bf448839-c4f1-5572-9003-9ecb5365d74b.html|title='I guess I thought we'd never end': Sum 41 on coming to terms with their breakup|work=The Canadian Press|date=January 29, 2025|access-date=February 28, 2025|archive-url=https://web.archive.org/web/20250129184408/https://www.thecanadianpressnews.ca/entertainment/i-guess-i-thought-wed-never-end-sum-41-on-coming-to-terms-with-their/article_bf448839-c4f1-5572-9003-9ecb5365d74b.html|archive-date=January 29, 2025|url-status=live}}</ref> Both said they were shocked and it took each of them speaking directly with Whibley by phone to understand the decision.<ref name="Canadian Press 2025"/> Whibley described years of finding excuses to keep Sum 41 together and only reaching certainty on his decision to break up the band after returning to a tour life after the [[COVID-19 pandemic]] closures.<ref name="Canadian Press 2025"/>

On March 28, 2025, the band released a cover of "[[Sleep Now in the Fire]]" by [[Rage Against the Machine]].<ref>{{cite magazine|first=Emily|last=Garner|url=https://www.kerrang.com/sum-41-cover-rage-against-the-machine-sleep-now-in-the-fire-spotify-singles-deryck-whibley-pop-punk-rap-metal|title=Sum 41 cover Rage Against The Machine for Spotify Singles|magazine=[[Kerrang!]]|date=March 28, 2025|access-date=April 2, 2025|archive-url=https://archive.today/20250402005250/https://www.kerrang.com/sum-41-cover-rage-against-the-machine-sleep-now-in-the-fire-spotify-singles-deryck-whibley-pop-punk-rap-metal|archive-date=April 2, 2025|url-status=live}}</ref> The band was inducted into the [[Canadian Music Hall of Fame]] on March 30, 2025 during the 54th annual [[Juno Awards of 2025|Juno Awards]].<ref>{{cite web|url=https://www.cbc.ca/music/junos/news/sum-41-canadian-music-hall-of-fame-induction-1.7391363|title=Sum 41 to be inducted into the Canadian Music Hall of Fame|work=[[CBC Music]]|date=November 22, 2024|access-date=November 23, 2024|archive-url=https://web.archive.org/web/20241123030700/https://www.cbc.ca/music/junos/news/sum-41-canadian-music-hall-of-fame-induction-1.7391363|archive-date=November 23, 2024|url-status=live}}</ref> Founding drummer Steve Jocz was also inducted but did not attend the ceremony.<ref>{{cite AV media|url=https://www.youtube.com/watch?v=winakRe0oEI|title=My Canadian Music Hall Of Fame Award Has Arrived!|publisher=Stevo32Drums|date=April 8, 2025|access-date=May 11, 2025|via=YouTube}}</ref> After the induction, the band released their final music video for the song "Radio Silence" on April 1, 2025.<ref>{{cite magazine|first=James|last=Wilson-Taylor|url=https://rocksound.tv/news/sum-41-release-farewell-music-video-for-radio-silence|title=Sum 41 Release Farewell Music Video For 'Radio Silence'|magazine=[[Rock Sound]]|date=April 1, 2025|access-date=April 2, 2025|archive-url=https://archive.today/20250402004858/https://rocksound.tv/news/sum-41-release-farewell-music-video-for-radio-silence|archive-date=April 2, 2025|url-status=live}}</ref>

The band's agent [[Dave Shapiro (music agent)|Dave Shapiro]] was killed in [[2025 San Diego Cessna Citation II crash|a plane crash]] in [[San Diego]] on May 22, 2025 along with former [[The Devil Wears Prada (band)|The Devil Wears Prada]] drummer [[Daniel Williams (musician)|Daniel Williams]].<ref>{{cite web|url=https://www.bbc.com/news/articles/c0mr844xl42o|title=Dave Shapiro: Sum 41 music agent killed in San Diego plane crash|work=[[BBC]]|date=May 22, 2025|access-date=May 24, 2025|archive-url=https://web.archive.org/web/20250522171401/https://www.bbc.com/news/articles/c0mr844xl42o|archive-date=May 22, 2025|url-status=live}}</ref><ref>{{cite magazine|first1=David|last1=Chiu|first2=Brian|last2=Brant|url=https://people.com/former-devil-wears-prada-drummer-and-music-agent-killed-private-plane-crashed-san-diego-neighborhood-11740582|title=Former The Devil Wears Prada Drummer and Music Agent Killed When Their Private Plane Crashed into Neighborhood|magazine=[[People (magazine)|People]]|date=May 22, 2025|access-date=May 24, 2025|archive-url=https://archive.today/20250523074753/https://people.com/former-devil-wears-prada-drummer-and-music-agent-killed-private-plane-crashed-san-diego-neighborhood-11740582|archive-date=May 23, 2025|url-status=live}}</ref>

==Side projects and collaborations==
Before the release of ''[[Half Hour of Power]],'' and up until the departures of [[Dave Baksh]] and [[Steve Jocz]], Sum 41 occasionally played as an [[alter ego]] 1980s [[heavy metal music|heavy metal]] band called Pain for Pleasure during shows.<ref name="patchchordnews">{{cite web|first=Iain|last=Scott|url=https://www.patchchordnews.com/sum-41-barrowlands-glasgow-28022017-dont-call-it-a-sum-back-tour/|title=Sum 41, Barrowlands, Glasgow, 28/02/2017 – Don't Call It A Sum-Back Tour|date=March 4, 2017|access-date=March 26, 2022|archive-url=https://web.archive.org/web/20170305062934/https://www.patchchordnews.com/sum-41-barrowlands-glasgow-28022017-dont-call-it-a-sum-back-tour/|archive-date=March 5, 2017|url-status=dead}}</ref> The band appeared in Sum 41's music videos for "[[Fat Lip]]" and "[[We're All to Blame]]" and had at least one song on each of the band's first three releases.<ref>{{cite magazine|first=Karen|last=Bliss|url=https://www.rollingstone.com/news/story/5936134/sum_cross_ts_with_dvd/print|title=Sum Cross T's With DVD|magazine=[[Rolling Stone]]|date=November 19, 2002|access-date=August 3, 2009}}{{dead link|date=August 2021|bot=medic}}{{cbignore|bot=medic}}</ref> The group's best known song under the Pain for Pleasure moniker is the song of the same name from ''[[All Killer No Filler]]'', a track that remains the band's staple during live shows and features drummer Steve Jocz on lead vocals. During the ''[[Don't Call It a Sum-Back Tour]]'' in 2017, Pain for Pleasure appeared performing the song at the end of their show with guitarist Tom Thacker replacing Jocz as the vocalist.<ref name="patchchordnews"/>

Sum 41 has collaborated with many other artists, both live and in the studio, including: [[MC Shan]], [[Tenacious D]],<ref>{{cite web|first=Aubin|last=Paul|url=http://www.punknews.org/article/27063/media-sum-41tenacious-d-things-i-want|title=Sum 41/Tenacious D: "Things I Want"|work=Punknews.org|date=December 24, 2007|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20121022032033/http://www.punknews.org/article/27063/media-sum-41tenacious-d-things-i-want|archive-date=October 22, 2012|url-status=live}}</ref> [[Ludacris]],<ref name="Ludacris">{{cite web|first=Rashaun|last=Hall|url=http://www.mtv.com/news/articles/1496104/20050120/ludacris.jhtml|title=Luda, Sum 41 Get Down On 'Get Back' During 'SNL' Rehearsal|work=[[MTV]]|date=January 20, 2005|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20080325224422/http://www.mtv.com/news/articles/1496104/20050120/ludacris.jhtml|archive-date=March 25, 2008|url-status=dead}}</ref> [[Iggy Pop]],<ref name="Iggy"/> [[Pennywise (band)|Pennywise]],<ref name="Kill Your Stereo collaborations">{{cite web|url=https://themusic.com.au/news/pennywisesum-41the-vandalsbowling-for-soup-australian-tour/utSmrK-u0dA/18-01-08|title=Pennywise/Sum 41/The Vandals/Bowling For Soup Australian tour|work=Kill Your Stereo|date=January 17, 2008|access-date=December 19, 2023}}</ref> [[Bowling for Soup]],<ref name="Kill Your Stereo collaborations"/> [[Unwritten Law]],<ref name="Law">{{cite web|first=Gene|last=Stout|url=http://www.seattlepi.com/pop/55728_sum25.shtml|title=Hot punk band Sum 41 is planning cool antics|work=Seattlepi|date=January 25, 2002|access-date=October 19, 2008|archive-url=https://web.archive.org/web/20141202032138/http://www.seattlepi.com/ae/music/article/Hot-punk-band-Sum-41-is-planning-cool-antics-1078323.php|archive-date=December 2, 2014|url-status=dead}}</ref> [[Mike Shinoda]],<ref>{{cite magazine|first=Kaitlyn|last=Ulrich|url=https://www.altpress.com/news/mike-shinoda-sum-41-linkin-parks-faint/|title=Mike Shinoda joins Sum 41 onstage for Linkin Park's "Faint"|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=August 26, 2018|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20180826221524/https://www.altpress.com/news/mike-shinoda-sum-41-linkin-parks-faint/|archive-date=August 26, 2018|url-status=live}}</ref> [[Treble Charger]],<ref>{{cite web|first=Jon|last=Wiederhorn|url=http://www.mtv.com/news/articles/1469818/20030206/treble_charger.jhtml|title=Avril, Sum 41 Part of Rear-End Mystery in Treble Charger Video|work=[[MTV]]|date=February 7, 2003|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20040928032423/http://www.mtv.com/news/articles/1469818/20030206/treble_charger.jhtml|archive-date=September 28, 2004|url-status=dead}}</ref> [[Gob (band)|Gob]],<ref name="Law"/> [[Tommy Lee]],<ref>{{cite web|first=Bill|last=Lamb|url=http://top40.about.com/od/albums/fr/tommyland.htm|title=Tommy Lee&nbsp;– Tommyland, the Ride|work=[[Dotdash Meredith|Top40]]|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20110604231940/http://top40.about.com/od/albums/fr/tommyland.htm|archive-date=June 4, 2011|url-status=dead}}</ref><ref name="Rob Halford">{{cite web|first=Graham|last=Hartmann|url=https://loudwire.com/rob-halford-tommy-lee-broke-sum-41/|title=The Night Rob Halford + Tommy Lee Broke Sum 41|work=[[Loudwire]]|date=March 10, 2021|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20230204154627/https://loudwire.com/rob-halford-tommy-lee-broke-sum-41/|archive-date=February 4, 2023|url-status=live}}</ref> [[Rob Halford]],<ref name="Rob Halford"/> [[Kerry King]],<ref name="Exclaim Gormely"/> [[Metallica]],<ref>{{cite web|url=http://skateboard.about.com/od/events/a/GravityGsMusic.htm|title=Sum 41 and The Donnas to Perform Friday Night at the Gravity Games|access-date=October 20, 2008|archive-url=https://web.archive.org/web/20110707075529/http://skateboard.about.com/od/events/a/GravityGsMusic.htm|archive-date=July 7, 2011|url-status=dead}}</ref> [[Ja Rule]],<ref>{{cite magazine|url=https://www.billboard.com/articles/news/76261/papa-roach-ja-rule-shakira-to-salute-aerosmith|title=Papa Roach, Ja Rule, Shakira To Salute Aerosmith|magazine=[[Billboard (magazine)|Billboard]]|date=April 2, 2002|access-date=June 20, 2019|archive-url=https://web.archive.org/web/20130704090641/https://www.billboard.com/articles/news/76261/papa-roach-ja-rule-shakira-to-salute-aerosmith|archive-date=July 4, 2013|url-status=live}}</ref> [[Darryl McDaniels|DMC]],<ref>{{cite magazine|url=https://www.altpress.com/sum_41_perform_with_dmc_and_original_guitarist_dave_brown_sound_baksh/|title=Sum 41 perform with DMC and original guitarist Dave "Brown Sound" Baksh|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=July 24, 2015|access-date=December 19, 2023|archive-url=https://web.archive.org/web/20230209122714/https://www.altpress.com/sum_41_perform_with_dmc_and_original_guitarist_dave_brown_sound_baksh/|archive-date=February 9, 2023|url-status=live}}</ref> and [[Nothing,Nowhere]].<ref>{{cite web|first=Greta|last=Brereton|url=https://www.nme.com/news/music/sum-41-team-up-with-nothing-nowhere-for-powerful-catching-fire-rework-2951288|title=Sum 41 team up with nothing, nowhere for powerful 'Catching Fire' rework|work=[[NME]]|date=May 30, 2021|access-date=July 2, 2022|archive-url=https://web.archive.org/web/20230228081745/https://www.nme.com/news/music/sum-41-team-up-with-nothing-nowhere-for-powerful-catching-fire-rework-2951288|archive-date=February 28, 2023|url-status=live}}</ref>

Shortly after touring for ''Does This Look Infected?'', Sum 41 was recruited by [[Iggy Pop]] for his album, ''[[Skull Ring]]''.<ref name="Iggy">{{cite web|first=Jon|last=Wiederhorn|url=http://www.mtv.com/news/articles/1480052/20031029/iggy_pop.jhtml|title=Iggy Pop, Sum 41 Think They 'Know It All'|work=[[MTV]]|date=October 29, 2003|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20031101090152/http://www.mtv.com/news/articles/1480052/20031029/iggy_pop.jhtml|archive-date=November 1, 2003|url-status=dead}}</ref> Whibley co-wrote the first single from the album, "[[Little Know It All]]", and joined Iggy on the ''[[Late Show with David Letterman]]'' to promote it.<ref name="Iggy"/> Following the band's show of September 11, 2005, in [[Quebec City]], [[Quebec]], the band went on a touring hiatus, although on April 17, 2006, Sum 41 played at a tribute to Iggy Pop, joining Iggy on stage for "Little Know It All" and "Lust For Life".<ref>{{cite magazine|first=Keith|last=Harris|url=https://www.rollingstone.com/music/music-lists/20-great-iggy-pop-collaborations-79224/skull-ring-feat-green-day-peaches-and-sum-41-2003-29370/|title=20 Great Iggy Pop Collaborations|magazine=[[Rolling Stone]]|date=March 17, 2016|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20230419033115/https://www.rollingstone.com/music/music-lists/20-great-iggy-pop-collaborations-79224/skull-ring-feat-green-day-peaches-and-sum-41-2003-29370/|archive-date=April 19, 2023|url-status=live}}</ref><ref>{{cite web|first=Thomas|last=Smith|url=https://www.nme.com/blogs/nme-blogs/iggy-pops-10-best-collaborations-1963561|title=Iggy Pop's 10 best collaborations|work=[[NME]]|date=August 29, 2017|access-date=January 29, 2023}}</ref><ref>{{cite web|first=Lily|last=Moayeri|url=https://www.miaminewtimes.com/music/iggy-pop-6346231|title=Iggy Pop|work=[[Miami New Times]]|date=November 6, 2003|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20230130051140/https://www.miaminewtimes.com/music/iggy-pop-6346231|archive-date=January 30, 2023|url-status=live}}</ref>

During the band's 2006 touring hiatus, Whibley focused on his producing career: he produced two songs for [[Avril Lavigne]]'s album ''[[The Best Damn Thing]]''.<ref>{{Cite news|first=Caitlin|last=Berens|url=https://www.reuters.com/article/us-lavigne-idUSTRE56Q5US20090727|title=Avril Lavigne ready to "mellow out and sing"|work=[[Reuters]]|date=July 27, 2009|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20221023065446/https://www.reuters.com/article/us-lavigne-idUSTRE56Q5US20090727|archive-date=October 23, 2022|url-status=live}}</ref> Jocz recorded his first video as director for a Canadian band, [[The Midway State]],<ref>{{cite web|url=http://www.soulshine.ca/news/newsarticle.php?nid=5249|title=The Midway State Release Debut Album|work=Soul Shine|date=February 7, 2008|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20200327021708/http://www.soulshine.ca/news/newsarticle.php?nid=5249|archive-date=March 27, 2020|url-status=dead}}</ref> and McCaslin started a side project with [[Todd Morse]] of [[H2O (American band)|H<sub>2</sub>O]] and [[Juliette and the Licks]].<ref name="The Operation M.D.">{{cite web|first=Keith|last=Carman|url=https://exclaim.ca/music/article/operation_md-we_have_emergency|title=The Operation M.D. We Have An Emergency|work=[[Exclaim!]]|date=February 28, 2007|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20220327062604/https://exclaim.ca/music/article/operation_md-we_have_emergency|archive-date=March 27, 2022|url-status=live}}</ref> McCaslin's two-person band, named [[The Operation M.D.]], released its debut album, ''[[We Have an Emergency]]'', in early 2007.<ref name="The Operation M.D."/> In 2022, Whibley was featured on the [[Simple Plan]] single, "Ruin My Life".<ref>{{cite web|first=Jake|last=Richardson|url=https://www.kerrang.com/simple-plan-and-sum-41-talk-ruin-my-life-and-the-exciting-and-bizarre-renaissance-of-pop-punk/|title=Simple Plan and Sum 41 talk Ruin My Life, and the "exciting and bizarre" renaissance of pop-punk|work=[[Kerrang!]]|date=February 18, 2022|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20220421093733/https://www.kerrang.com/simple-plan-and-sum-41-talk-ruin-my-life-and-the-exciting-and-bizarre-renaissance-of-pop-punk/|archive-date=April 21, 2022|url-status=live}}</ref><ref>{{cite web|first=Matt|last=Bobkin|url=https://exclaim.ca/music/article/simple_plan_deryck_whibley_sum_41_single_ruin_my_life_interview|title=Simple Plan and Sum 41 Bury the Hatchet with New Collaborative Single "Ruin My Life"|work=[[Exclaim!]]|date=February 18, 2022|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20220304234702/https://exclaim.ca/music/article/simple_plan_deryck_whibley_sum_41_single_ruin_my_life_interview|archive-date=March 4, 2022|url-status=live}}</ref><ref>{{cite magazine|first=Taylor|last=Linzinmeir|url=https://www.altpress.com/simple-plan-sum-41-deryck-whibley-ruin-my-life/|title=Simple Plan and Sum 41's Deryck Whibley release "Ruin My Life"—listen|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=February 18, 2022|access-date=January 29, 2023|archive-url=https://web.archive.org/web/20230130051134/https://www.altpress.com/simple-plan-sum-41-deryck-whibley-ruin-my-life/|archive-date=January 30, 2023|url-status=live}}</ref>

==Musical style and influences==

{{Listen|filename=Fat Lip.ogg|title="Fat Lip"|description=Sample of "[[Fat Lip]]" from [[All Killer No Filler]]. "Fat Lip" has been described as pop-punk, much like the band's other material.<ref>{{cite web|url=http://www.nme.com/blogs/nme-blogs/the-essential-pop-punk-playlist-1188256|title=20 Essential Pop Punk Tracks Everyone Should Know|work=[[NME]]|date=June 2, 2011|access-date=September 24, 2024|archive-url=https://web.archive.org/web/20230418005427/https://www.nme.com/blogs/nme-blogs/the-essential-pop-punk-playlist-1188256|archive-date=April 18, 2023|url-status=live}}</ref> Unlike the band's other material, the song contains rapping during the verses.<ref>{{cite web|first=Dan|last=Weiss|url=http://www.laweekly.com/music/ten-rap-rock-songs-that-are-actually-awesome-2401191|title=Ten Rap-Rock Songs That Are Actually Awesome|work=[[LA Weekly]]|date=April 6, 2012|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20220516080947/https://www.laweekly.com/ten-rap-rock-songs-that-are-actually-awesome/|archive-date=May 16, 2022|url-status=live}}</ref><ref>{{cite web|first=Brendan|last=Menapace|url=https://www.stereogum.com/2144152/sum-41-fat-lip-all-killer-no-filler/interviews/qa/|title=Still Killer: Deryck Whibley On Sum 41's "Fat Lip" 20 Years Later|work=[[Stereogum]]|date=April 22, 2021|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230415162443/https://www.stereogum.com/2144152/sum-41-fat-lip-all-killer-no-filler/interviews/qa/|archive-date=April 15, 2023|url-status=live}}</ref>|format=[[Ogg]]}}
Sum 41 has been described as [[pop-punk]], [[skate punk]], [[punk rock]], [[Heavy metal music|heavy metal]], [[alternative metal]], [[melodic hardcore]], [[alternative rock]], [[thrash metal]], [[pop rock]], [[punk metal]], [[arena rock]], and [[hard rock]].{{refn|group=note|Musical styles:{{columns-list|colwidth=30em| 
*"[[pop-punk]]"<ref name="Allmusic overview"/><ref name="Colburn"/><ref name="exclaim never there"/><ref name="Heaven and Hell"/><ref name=Gavin>{{cite magazine|first=Gavin|last=Edwards|url=https://www.rollingstone.com/music/news/sum-41-teenage-rock-roll-machine-20010924|title=Sum 41: Teenage Rock & Roll Machine|magazine=[[Rolling Stone]]|date=September 24, 2001|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20160103015355/http://www.rollingstone.com/music/news/sum-41-teenage-rock-roll-machine-20010924|archive-date=January 3, 2016|url-status=dead}}</ref><ref name="Nardine Saad">{{cite web|first=Nardine|last=Saad|url=https://www.latimes.com/entertainment-arts/music/story/2023-05-08/sum-41-disbanding-breaking-up-heave-x-hell-album-tour|title='Disbanding,' you say? Sum 41 rockers say they're splitting after new album and tour|work=[[Los Angeles Times]]|date=May 8, 2023|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230509025024/https://www.latimes.com/entertainment-arts/music/story/2023-05-08/sum-41-disbanding-breaking-up-heave-x-hell-album-tour|archive-date=May 9, 2023}}</ref>
*"[[skate punk]]"<ref name=Gavin/><ref name="Punknews">{{cite web|first=Mike|last=Elfers|url=https://www.punknews.org/review/16661/sum-41-order-in-decline|title=Sum 41 Order in Decline (2019)|work=Punknews.org|date=August 5, 2019|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230419232513/https://www.punknews.org/review/16661/sum-41-order-in-decline|archive-date=April 19, 2023|url-status=live}}</ref><ref name=CMJ>{{cite journal|title=Sum 41 Half Hour of Power|journal=[[CMJ New Music Monthly]]|last=Behrman|first=Lorne|number=85|year=2000|issn=1074-6978 |page=61}}</ref><ref>{{cite web|first=Al|last=Horner|url=https://www.nme.com/blogs/nme-blogs/10-albums-that-wouldnt-exist-without-green-days-dookie|title=10 Albums That Wouldn't Exist Without Green Day's 'Dookie'|work=[[NME]]|date=January 31, 2014|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230326033155/https://www.nme.com/blogs/nme-blogs/10-albums-that-wouldnt-exist-without-green-days-dookie-768209|archive-date=March 26, 2023|url-status=live}}</ref><ref>{{cite web|first=Cody|last=Fitzpatrick|url=https://www.phoenixnewtimes.com/music/sum-41-tell-the-story-behind-chuck-11375550|title=Sum 41 Tell the Story Behind Chuck|work=[[Phoenix New Times]]|date=October 18, 2019|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230128040407/https://www.phoenixnewtimes.com/music/sum-41-tell-the-story-behind-chuck-11375550|archive-date=January 28, 2023|url-status=live}}</ref><ref>{{cite web|url=http://www.hotpress.com/Sum-41/news/Sum-41-get-to-The-Point/2622120.html|title=Sum 41 get to The Point|work=[[Hot Press]]|date=November 12, 2002|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20151211000646/http://www.hotpress.com/Sum-41/news/Sum-41-get-to-The-Point/2622120.html|archive-date=December 11, 2015|url-status=live}}</ref> 
*"[[punk rock]]"<ref name="Nardine Saad"/><ref name="cosOrder in Decline"/><ref>{{cite web|url=https://blabbermouth.net/news/sum-41s-deryck-whibley-sells-publishing-catalog-to-harbourview|title=Sum 41's Deryck Whibley Sells Publishing Catalog To Harbourview|work=[[Blabbermouth.net]]|date=August 18, 2022|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230518073127/https://blabbermouth.net/news/sum-41s-deryck-whibley-sells-publishing-catalog-to-harbourview|archive-date=May 18, 2023|url-status=live}}</ref><ref>{{cite magazine|first=Joe|last=Smith-Engelhardt|url=https://www.altpress.com/features/sum-41-order-in-decline-politics-interview/|title=Sum 41 singer Deryck Whibley boycotts the news for the sake of his sanity|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=June 12, 2019|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20210623173832/https://www.altpress.com/features/sum-41-order-in-decline-politics-interview/|archive-date=June 23, 2021|url-status=live}}</ref><ref>{{cite web|first=Christopher|last=Brito|url=https://www.cbsnews.com/news/sum-41-disbanding-concert-tour-deryck-whibley/|title=Sum 41 says it's disbanding after 27 years together|work=[[CBS News]]|date=May 9, 2023|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230601113057/https://www.cbsnews.com/news/sum-41-disbanding-concert-tour-deryck-whibley/|archive-date=June 1, 2023|url-status=live}}</ref><ref name="7newss">{{cite web|first=Ana|last=Gonzalez|url=https://7news.com.au/entertainment/music/punk-rock-band-sum-41-announces-break-up-c-10590481|title=Punk rock band Sum 41 announces break up|work=7news|date=May 8, 2023|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20231002232200/https://7news.com.au/entertainment/music/punk-rock-band-sum-41-announces-break-up-c-10590481|archive-date=October 2, 2023|url-status=live}}</ref> 
*"[[Heavy metal music|heavy metal]]"<ref name="Punknews"/><ref name="Vulture Hound - 13 Voices">{{cite web|first=Lee|last=Hazell|url=https://vulturehound.co.uk/2016/10/sum-41-13-voices-album-review/|title=Sum 41 – 13 Voices (Album Review)|work=Vulture Hound|date=October 7, 2016|access-date=January 27, 2023|archive-url=https://web.archive.org/web/20161111134951/https://vulturehound.co.uk/2016/10/sum-41-13-voices-album-review/|archive-date=November 11, 2016|url-status=dead}}</ref><ref name="Exclaim - 13 Voices">{{Cite web|first=Bradley|last=Zorgdrager|url=http://exclaim.ca/music/article/sum_41-13_voices|title=Sum 41 13 Voices|work=[[Exclaim!]]|date=October 5, 2016|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230404181120/http://exclaim.ca/music/article/sum_41-13_voices|archive-date=April 4, 2023|url-status=live}}</ref> 
*"[[alternative metal]]"<ref>{{cite web|url=http://www.sptimes.com/News/120501/news_pf/NorthPinellas/In_spite_of_some_feed.shtml|title=Northpinellas: In spite of some feedback, rock concert was success|work=Sptimes|date=December 5, 2001|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20150924140428/http://www.sptimes.com/News/120501/news_pf/NorthPinellas/In_spite_of_some_feed.shtml|archive-date=September 24, 2015|url-status=dead}}</ref><ref>{{cite web|url=https://www.tampabay.com/archive/2001/12/05/in-spite-of-some-feedback-rock-concert-was-success/|title=In spite of some feedback, rock concert was success|work=[[Tampa Bay Times]]|date=December 5, 2001|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230419134149/https://www.tampabay.com/archive/2001/12/05/in-spite-of-some-feedback-rock-concert-was-success/|archive-date=April 19, 2023|url-status=live}}</ref>
*"[[melodic hardcore]]"<ref name="Carouser All">{{cite web|first=Daragh|last=Markham|url=http://thecarouser.com/2014/06/18/all-messed-up-a-look-back-at-sum-41s-does-this-look-infected/|title=All Messed Up: A Look Back At Sum 41's 'Does This Look Infected?'|work=The Carouser|date=June 18, 2014|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20150716103857/http://thecarouser.com/2014/06/18/all-messed-up-a-look-back-at-sum-41s-does-this-look-infected/|archive-date=July 16, 2015|url-status=dead}}</ref><ref>{{cite web|first=Rachela|last=Saletta|url=http://www.melodicamente.com/i-sum-41-allindipendent-days-festival-la-probabile-scaletta/|title=I Sum 41 all'Indipendent Days Festival. La probabile scaletta|publisher=MelodicaMente|date=September 4, 2010|access-date=March 27, 2022}}</ref> 
*"[[alternative rock]]"<ref name="7newss"/><ref>{{cite magazine|first=Andy|last=Greene|url=https://www.rollingstone.com/music/music-features/inside-sum-41s-dramatic-comeback-125046/|title=Inside Sum 41's Dramatic Comeback|magazine=[[Rolling Stone]]|date=October 24, 2016|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20190502051235/https://www.rollingstone.com/music/music-features/inside-sum-41s-dramatic-comeback-125046/|archive-date=May 2, 2019|url-status=live}}</ref>
*"[[thrash metal]]"<ref>{{cite web|url=https://www.rte.ie/entertainment/music-reviews/2004/1115/449194-sum41/|title=Sum 41 - Chuck|work=Rte.ie|date=November 15, 2004|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230415160939/https://www.rte.ie/entertainment/music-reviews/2004/1115/449194-sum41/|archive-date=April 15, 2023|url-status=live}}</ref><ref name="Toilet of Hell - Chuck">{{cite web|url=http://www.toiletovhell.com/sum-41-wrote-a-thrash-metal-album-when-you-werent-looking/|title=Toilet of Hell – Chuck|work=Toilettovhell|date=October 1, 2014|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230423040209/http://www.toiletovhell.com/sum-41-wrote-a-thrash-metal-album-when-you-werent-looking/|archive-date=April 23, 2023|url-status=live}}</ref> 
*"[[pop rock]]"<ref name="Nardine Saad"/><ref name="Punknews"/> 
*"[[punk metal]]"<ref>{{cite book|title=The Greenwood Encyclopedia of Rock History: The grunge and post-grunge years, 1991-2005|date=2006|publisher=Greenwood Press}}</ref>
*"[[arena rock]]"<ref name="altpress10bands">{{cite magazine|first=Joe|last=Smith-Engelhardt|url=https://www.altpress.com/features/best-debut-albums/|title=10 Bands Whose Debut Albums Contain Their Most Iconic Material|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=October 16, 2019|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20191017030035/https://www.altpress.com/features/best-debut-albums/|archive-date=October 17, 2019|url-status=live}}</ref> 
*"[[hard rock]]"<ref name="fyimusicnews">{{cite magazine|url=https://ca.billboard.com/fyi/sum-41-out-blood|title=Sum 41: Out For Blood|magazine=Billboard Canada|date=April 25, 2019|access-date=September 24, 2024|archive-url=https://web.archive.org/web/20231213034515/https://ca.billboard.com/fyi/sum-41-out-blood|archive-date=December 13, 2023|url-status=live}}</ref> 
}}}}<!--End note-->

In a November 2004 interview, Deryck Whibley said: "We don't even consider ourselves punk. We're just a rock band. We want to do something different. We want to do our own thing. That's how music has always been to us."<ref>{{cite web|first=Phil|last=Bonyata|url=http://www.concertlivewire.com/interviews/deryck.htm|title=Deryck Whibley of Sum 41 Interview - One on One|work=Concert Livewire|date=November 25, 2004|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230415160939/http://www.concertlivewire.com/interviews/deryck.htm|archive-date=April 15, 2023|url-status=live}}</ref> Dave Baksh reiterated Whibley's claims, stating "We just call ourselves rock... It's easier to say than punk, especially around all these fuckin' kids that think they know what punk is. Something that was based on not having any rules has probably one of the strictest fucking rule books in the world."<ref name=Phoenix>{{cite web|first=Geoff|last=Harkness|url=https://www.phoenixnewtimes.com/music/pop-punk-and-then-sum-6398321|title=Pop-Punk and Then Sum|work=[[Phoenix New Times]]|date=June 9, 2005|access-date=December 12, 2023|archive-url=https://web.archive.org/web/20230419035924/https://www.phoenixnewtimes.com/music/pop-punk-and-then-sum-6398321|archive-date=April 19, 2023|url-status=live}}</ref>

Sum 41's musical style has consistently changed between albums.<ref name="Stewart 2023" /> The band's EP ''[[Half Hour of Power]]'' is described as pop-punk<ref name=Half/><ref name=Paul/><ref>{{cite magazine|first=Ewan|last=Wadharmi|url=http://www.hybridmagazine.com/reviews/1200/sum41.shtml|title=Sum 41 – Half Hour of Power|magazine=Hybridmagazine|access-date=December 20, 2023|archive-url=https://web.archive.org/web/20010510052831/http://www.hybridmagazine.com/reviews/1200/sum41.shtml|archive-date=May 10, 2001|url-status=dead}}</ref> and skate punk.<ref name=CMJ /><ref name=Paul>{{cite web|url=http://www.punktastic.com/album-reviews/sum-41-half-hour-of-power/|title=Sum 41 – Half Hour of Power|work=Punktastic|date=July 30, 2004|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20210307192909/http://www.punktastic.com/album-reviews/sum-41-half-hour-of-power/|archive-date=March 7, 2021|url-status=live}}</ref> ''[[All Killer No Filler]]'' was also described as pop-punk<ref name="Allmusic overview"/><ref name="Pop matter pop punk">{{cite web|first=Andrew|last=Blackie|url=http://www.popmatters.com/review/sum-41-underclass-hero/|title=Sum 41: Underclass Hero|work=[[PopMatters]]|date=August 21, 2007|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230409141939/https://www.popmatters.com/sum-41-underclass-hero-2496219032.html|archive-date=April 9, 2023|url-status=live}}</ref><ref>{{cite magazine|first=Yasmine|last=Shemesh|url=https://www.billboard.com/music/rock/sum-41-interview-all-killer-no-filler-9552792/|title=Sum 41's Deryck Whibley on 'All Killer No Filler' at 20: 'For the Longest Time, I Thought It Wasn't Very Good'|magazine=[[Billboard (magazine)|Billboard]]|date=April 7, 2021|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20230415160942/https://www.billboard.com/music/rock/sum-41-interview-all-killer-no-filler-9552792/|archive-date=April 15, 2023|url-status=live}}</ref> and skate punk<ref>{{cite web|first=El|last=Hunt|url=https://www.theguardian.com/music/2022/oct/23/sum-41-review-a-joyful-pop-punk-celebration-alexandra-palace|title=Sum 41 review – a joyful pop punk celebration |work=[[The Guardian]]|date=October 23, 2022|access-date=December 20, 2023|archive-url=https://web.archive.org/web/20230329154210/https://www.theguardian.com/music/2022/oct/23/sum-41-review-a-joyful-pop-punk-celebration-alexandra-palace|archive-date=March 29, 2023|url-status=live}}</ref> (except for "Pain for Pleasure", which is purely heavy metal).<ref name="D'Angelo">{{cite web|first=Joe|last=D'Angelo|url=http://www.mtv.com/bands/s/sum_41/news_feature_080202/index.jhtml|title=Sum 41: Testing Their Metal|work=[[MTV]]|access-date=October 20, 2008|archive-url=https://web.archive.org/web/20090113093507/http://www.mtv.com/bands/s/sum_41/news_feature_080202/index.jhtml|archive-date=January 13, 2009|url-status=dead}}</ref> ''[[Does This Look Infected?]]'' has been described as punk rock,<ref>{{cite magazine|first=Tom|last=Sinclair|url=https://ew.com/article/2002/11/29/does-this-look-infected/|title=Does This Look Infected Review|magazine=[[Entertainment Weekly]]|date=November 29, 2002|access-date=April 2, 2022|archive-url=https://web.archive.org/web/20090425181452/https://www.ew.com/ew/article/0,,393126,00.html|archive-date=April 25, 2009|url-status=live}}</ref> pop-punk<ref name="Pop matter pop punk"/> melodic hardcore,<ref name="Carouser All"/> [[horror punk]],<ref name="Carouser All"/> and heavy metal.<ref name="Carouser All"/> ''[[Chuck (Sum 41 album)|Chuck]]'' departed heavily from their pop-punk origins, into a sound influenced by heavy metal and [[hardcore punk]],<ref name="Chuck AllMusic"/><ref name="Toilet of Hell - Chuck"/> and has been categorised by critics as alternative metal,<ref name="Stewart 2023" /> thrash metal<ref name="Toilet of Hell - Chuck"/><ref name="Stewart 2023">{{cite web|first=Ethan|last=Stewart|url=https://www.popmatters.com/ranking-the-sum-41-albums|title=Ranking The Sum 41 Albums: From Pop-punk To Thrash Metal|work=[[PopMatters]]|date=May 17, 2023|access-date=May 17, 2023|archive-url=https://web.archive.org/web/20230519131735/https://www.popmatters.com/ranking-the-sum-41-albums|archive-date=May 19, 2023|url-status=live}}</ref> and melodic hardcore.<ref name="Stewart 2023" /> ''[[Underclass Hero]]'' was as a revival of the band's pop-punk style,<ref>{{cite web|first=Vik|last=Bansal|url=http://www.musicomh.com/albums/sum-41.htm|title=Sum 41 Album reviews|work=[[MusicOMH]]|access-date=August 19, 2008|archive-url=https://web.archive.org/web/20080704052931/http://www.musicomh.com/albums/sum-41.htm|archive-date=July 4, 2008|url-status=dead}}</ref> however differentiated itself from their early work through its heavy use of acoustic guitars, complex vocal harmonies, pianos and organs.<ref>{{cite web|author=Stephen Thomas Erlewine|url=https://www.allmusic.com/album/underclass-hero-mw0000584729|title=Underclass Hero Sum 41|work=[[AllMusic]]|access-date=May 24, 2023|archive-url=https://web.archive.org/web/20230415160939/https://www.allmusic.com/album/underclass-hero-mw0000584729|archive-date=April 15, 2023|url-status=live}}</ref> ''[[Screaming Bloody Murder]]'' saw the band turn in a much darker direction. Sonically it was a return to metal, while also incorporating elements of [[garage rock]] and, on some songs, [[progressive rock]].<ref name="Stewart 2023" /> ''[[13 Voices]]'' and ''[[Order in Decline]]'' saw the band continue in this heavier direction, incorporating elements of hardcore punk, [[metalcore]] and thrash metal.<ref name="Stewart 2023" /> Their final album, ''[[Heaven :x: Hell]]'', is a [[double album]] which features both a return to the pop-punk sound of the band's early career, and a continuation of the band's later heavy metal sound.<ref>{{cite web|first=Greg|last=Kennelty|url=https://metalinjection.net/upcoming-releases/sum-41s-new-album-is-somewhat-of-a-nod-to-black-sabbath|title=Sum 41's New Album Is "Somewhat Of A Nod To Black Sabbath"|work=Metal Injection|date=April 6, 2022|access-date=April 1, 2024|archive-url=https://web.archive.org/web/20240316094734/https://metalinjection.net/upcoming-releases/sum-41s-new-album-is-somewhat-of-a-nod-to-black-sabbath|archive-date=March 16, 2024|url-status=live}}</ref><ref>{{cite web|url=https://blabbermouth.net/news/sum-41s-new-album-heaven-x-hell-to-arrive-in-spring-2024|title=Sum 41's New Album 'Heaven :x: Hell' To Arrive In Spring 2024|work=[[Blabbermouth.net]]|date=October 31, 2023|access-date=April 1, 2024|archive-url=https://web.archive.org/web/20231102021224/https://blabbermouth.net/news/sum-41s-new-album-heaven-x-hell-to-arrive-in-spring-2024|archive-date=November 2, 2023|url-status=live}}</ref> This album was also described as skate punk,<ref name="Noizze rev">{{cite web|first=Tom|last=Bruce|url=https://www.noizze.co.uk/sum-41-heaven-x-hell-album-review/|title=Sum 41 – Heaven :x: Hell Album Review|work=Noizze UK|date=March 28, 2024|access-date=April 1, 2024|archive-url=https://web.archive.org/web/20240328203618/https://www.noizze.co.uk/sum-41-heaven-x-hell-album-review/|archive-date=March 28, 2024|url-status=live}}</ref> alternative rock,<ref name="Noizze rev"/> and alternative metal.<ref>{{cite magazine|first=Adrian|last=Garro|url=https://rockcellarmagazine.com/sum-41-heaven-hell-album-review-final-album-tour-dates-deryck-whibley/#google_vignette|title=Review: Sum 41 Bows Out with Final Album, 'Heaven :x: Hell' – a Career-Spanning Mix of Pop/Punk/Metal Precision|magazine=Rock Cellar Magazine|date=March 28, 2024|access-date=April 1, 2024|archive-url=https://web.archive.org/web/20240328203618/https://rockcellarmagazine.com/sum-41-heaven-hell-album-review-final-album-tour-dates-deryck-whibley/#google_vignett|archive-date=March 28, 2024|url-status=live}}</ref>

Some of the band's songs contain political-social commentary; "[[Still Waiting (Sum 41 song)|Still Waiting]]" is an anti-[[George W. Bush]] and anti-[[Iraq War]] song,<ref>{{cite web|first=Ed|last=Masley|url=https://www.azcentral.com/story/entertainment/music/2018/04/19/sum-41-deryck-whibley-interview-does-look-infected-anniversary-tour/530458002/|title=Sum 41's Deryck Whibley looks back on 'Does This Look Infected?' in advance of anniversary tour|work=[[The Arizona Republic]]|date=April 19, 2018|access-date=May 3, 2019|archive-url=https://web.archive.org/web/20230412022930/https://www.azcentral.com/story/entertainment/music/2018/04/19/sum-41-deryck-whibley-interview-does-look-infected-anniversary-tour/530458002/|archive-date=April 12, 2023|url-status=live}}</ref><ref>{{cite magazine|first=Emma|last=Wilkes|url=https://www.altpress.com/sum-41-still-waiting-oral-history/|title=Sum 41 still remember creating the magic and mayhem behind their 2002 hit "Still Waiting"|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=January 24, 2023|access-date=December 20, 2023|archive-url=https://web.archive.org/web/20230320215058/https://www.altpress.com/sum-41-still-waiting-oral-history/|archive-date=March 20, 2023|url-status=live}}</ref> "The Jester" and "[[March of the Dogs]]" also are critical of Bush,<ref name="George W. Bush"/> "45 (A Matter of Time)" is critical of U.S. president [[Donald Trump]],<ref>{{cite web|first=David|last=Friend|url=https://www.thestar.com/entertainment/music/2019/07/10/i-tried-to-fight-it-sum-41-songwriter-lets-trump-into-tunes.html|title='I tried to fight it': Sum 41 songwriter lets Trump into tunes|newspaper=[[Toronto Sun]]|date=July 10, 2019|access-date=January 31, 2023|archive-url=https://web.archive.org/web/20230419190056/https://www.thestar.com/entertainment/music/2019/07/10/i-tried-to-fight-it-sum-41-songwriter-lets-trump-into-tunes.html|archive-date=April 19, 2023|url-status=live}}</ref><ref>{{cite web|url=https://blabbermouth.net/news/sum-41-frontman-on-donald-trump-hes-not-my-kind-of-guy|title=Sum 41 Frontman On Donald Trump: 'He's Not My Kind Of Guy'|work=[[Blabbermouth.net]]|date=July 9, 2019|access-date=December 20, 2023|archive-url=https://web.archive.org/web/20190710015348/http://www.blabbermouth.net/news/sum-41-frontman-on-donald-trump-hes-not-my-kind-of-guy/|archive-date=July 10, 2019|url-status=live}}</ref> "[[Underclass Hero (song)|Underclass Hero]]" is a song about class struggle, and "Dear Father" and "[[Never There (Sum 41 song)|Never There]]" are about Whibley's absent father.<ref>{{cite magazine|first=Christian|last=Hoard|url=https://www.rollingstone.com/artists/sum41/albums/album/15502568/review/15807523/underclass_hero|title=Underclass Hero Review|magazine=[[Rolling Stone]]|date=August 23, 2007|access-date=August 19, 2008|archive-url=https://web.archive.org/web/20080708232543/http://www.rollingstone.com/artists/sum41/albums/album/15502568/review/15807523/underclass_hero|archive-date=July 8, 2008|url-status=dead}}</ref><ref>{{cite web|last=Hughes|first=Josiah|title=Deryck Whibley Discusses Sum 41's Order in Decline Track By Track|url=https://www.kerrang.com/features/deryck-whibley-discusses-sum-41s-order-in-decline-track-by-track/ |website=[[Kerrang!]] |date=19 July 2019 |accessdate=5 March 2025}}</ref>

Sum 41's influences include [[Weezer]], [[Slayer]], [[the Police]], [[Devo]], [[Megadeth]], [[Pennywise (band)|Pennywise]], [[Refused (band)|Refused]], [[Rancid (band)|Rancid]], [[No Use for a Name]], [[the Vandals]], [[Anthrax (American band)|Anthrax]], [[Carcass (band)|Carcass]], [[Dio (band)|Dio]], [[Judas Priest]], [[Foo Fighters]], [[Green Day]], [[NOFX]], [[Lagwagon]], [[Face to Face (punk band)|Face to Face]], [[Nirvana (band)|Nirvana]], [[the Beatles]] (including [[John Lennon]]'s solo work), [[Elvis Costello]], [[Beastie Boys]], [[Run–D.M.C.]], [[Rob Base and DJ E-Z Rock]], [[Metallica]], [[Guns N' Roses]], and [[Iron Maiden]].{{refn|group=note|Influenced by:{{columns-list|colwidth=30em|
* [[Weezer]],<ref name=SpinPoll>{{cite magazine|url=https://books.google.com/books?id=w8s9P_S6njMC&q=%22sum+41%22+%22favorite%22&pg=PA80|title=Readers Poll 2001|magazine=[[Spin Magazine|Spin]]|pages=79–80|date=March 2002|volume=18|number=3|issn=0886-3032|publisher=Spin Media LLC}}</ref> 
* [[Slayer]],<ref>{{cite web|first=Gary|last=Ryan|url=https://www.nme.com/music-interviews/july-6-braincellsdoes-rock-n-roll-kill-braincells-deryck-whibley-sum-41-2521197|title=Does Rock 'N' Roll Kill Braincells?! - Derrick Whibley, Sum 41|work=[[NME]]|date=July 9, 2019|access-date=October 15, 2019|archive-url=https://web.archive.org/web/20190709162914/https://www.nme.com/music-interviews/july-6-braincellsdoes-rock-n-roll-kill-braincells-deryck-whibley-sum-41-2521197|archive-date=July 9, 2019|url-status=live}}</ref> 
* [[the Police]],<ref name=SpinPoll/> 
* [[Devo]],<ref name=SpinPoll/> 
* [[Megadeth]],<ref name=MetalProject/> 
* [[Pennywise (band)|Pennywise]],<ref name=UG/><ref name=Modern>{{cite magazine|title=The Modern Age|magazine=[[Billboard (magazine)|Billboard]]|last=Pesselnick|first=Jill|date=May 19, 2001|issn=0006-2510|volume=113|number=20|publisher=[[Nielsen Business Media, Inc.]]|page=80}}</ref> 
* [[Refused (band)|Refused]],<ref>{{cite journal|last1=di Perna|first1=Alan|title=Sum 41: Blow Up|journal=[[Guitar World]]|date=December 2004|url=https://www.guitarworld.com/features/sum-41-blow}}</ref> 
* [[Rancid (band)|Rancid]],<ref name=Modern/><ref name=Chron>{{cite web|first=Vaughn|last=Watson|url=https://www.chron.com/life/article/Pop-punkers-Sum-41-cut-through-rock-star-egotism-2062360.php|title=Pop-punkers Sum 41 cut through rock-star egotism|work=[[Houston Chronicle]]|date=April 16, 2002|access-date=June 9, 2019|archive-url=https://web.archive.org/web/20230419232512/https://www.chron.com/life/article/Pop-punkers-Sum-41-cut-through-rock-star-egotism-2062360.php|archive-date=April 19, 2023|url-status=live}}</ref> 
* [[No Use for a Name]],<ref name=Riot/> 
* [[the Vandals]],<ref name="HOLLY">{{cite web|url=http://www.hollywood.com/general/sum-41-interview-57163118/|title=Sum 41 Interview|work=[[Hollywood.com]]|date=May 28, 2014|access-date=January 31, 2023|archive-url=https://web.archive.org/web/20170821043710/http://www.hollywood.com/general/sum-41-interview-57163118/|archive-date=August 21, 2017|url-status=dead}}</ref> 
* [[Anthrax (American band)|Anthrax]],<ref name=MetalSludge/><ref name=MetalProject>{{cite web|url=http://www.blabbermouth.net/news/ex-sum-41-guitarist-returns-with-metal-project-brown-brigade-audio-available/|title=Ex-Sum 41 Guitarist Returns With Metal Project Brown Brigade: Audio Available|work=[[Blabbermouth.net]]|date=September 10, 2006|access-date=June 9, 2019|archive-url=https://web.archive.org/web/20230423164015/https://blabbermouth.net/news/ex-sum-41-guitarist-returns-with-metal-project-brown-brigade-audio-available|archive-date=April 23, 2023|url-status=live}}</ref> 
* [[Carcass (band)|Carcass]],<ref name=MetalSludge>{{cite web|url=http://metalsludge.tv/classic/?p=28675|title=20 Questions with Sum 41's Brown Sound, 8/6/02|work=Metal Sludge|date=October 6, 2002|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20210225162408/http://metalsludge.tv/classic/?p=28675|archive-date=February 25, 2021|url-status=dead}}</ref> 
* [[Dio (band)|Dio]],<ref name=Riot>{{cite web|first=Lorena|last=Cupcake|url=https://riotfest.org/2018/07/sum-41-battled-boy-bands-and-won/|title=How Sum 41 Battled Boy Bands... and Totally Won|work=[[Riot Fest]]|date=July 12, 2018|access-date=June 7, 2019|archive-url=https://web.archive.org/web/20220122211421/https://riotfest.org/2018/07/sum-41-battled-boy-bands-and-won/|archive-date=January 22, 2022|url-status=live}}</ref> 
* [[Judas Priest]],<ref name=UG/><ref name=Chron/><ref>{{cite web|first=Graham|last=Hartmann|url=https://loudwire.com/sum-41-voices-dave-baksh-return-deryck-whibley-recovery/|title=Sum 41 Talk '13 Voices,' Dave's Return + Deryck's Recovery|work=[[Loudwire]]|date=October 25, 2016|access-date=June 23, 2019|archive-url=https://web.archive.org/web/20230415160941/https://loudwire.com/sum-41-voices-dave-baksh-return-deryck-whibley-recovery/|archive-date=April 15, 2023|url-status=live}}</ref> 
* [[Foo Fighters]],<ref name="HHO">{{cite web|url=http://www.hiponline.com/3344/sum-41-interview-2001.html|title=Sum 41 – Interview [2001]|work=Hip Online|date=August 6, 2001|access-date=January 19, 2019|archive-url=https://web.archive.org/web/20210228090950/http://www.hiponline.com/3344/sum-41-interview-2001.html|archive-date=February 28, 2021|url-status=live}}</ref> 
* [[Green Day]],<ref name="HOLLY"/> 
* [[NOFX]],<ref name=Chron/><ref name="knac.com"/><ref name="WhibleyInsp"/><ref>{{cite web|url=https://www.youtube.com/watch?v=hgdWDKLNx0U|title=Deryck Whibley on how NOFX inspired him to start Sum 41 - Juice Singapore|publisher=[[YouTube]]|date=August 25, 2017|access-date=April 3, 2022|archive-url=https://ghostarchive.org/varchive/youtube/20211102/hgdWDKLNx0U|archive-date=November 3, 2021|url-status=live|last=JUICE Singapore}}{{cbignore}}</ref> 
* [[Lagwagon]],<ref name=UG/> 
* [[Face to Face (punk band)|Face to Face]],<ref name=UG>{{cite web|url=https://www.ultimate-guitar.com/news/general_music_news/frontman_deryck_whibley_explains_the_meaning_of_sum_41_name.html|title=Frontman Derrick Whibley Explains the Meaning of 'Sum 41' Name|work=[[Ultimate-Guitar]]|date=July 18, 2019|access-date=October 15, 2019|archive-url=https://web.archive.org/web/20230415160939/https://www.ultimate-guitar.com/news/general_music_news/frontman_deryck_whibley_explains_the_meaning_of_sum_41_name.html|archive-date=April 15, 2023|url-status=live}}</ref> 
* [[Nirvana (band)|Nirvana]],<ref name="SpinPoll" /><ref>{{cite web|url=https://www.youtube.com/watch?v=H0uerYiqD8U|title=Sum 41: Kurt Cobain's Influence - Cone McCaslin|publisher=[[YouTube]]|date=November 15, 2018|access-date=May 3, 2019|archive-url=https://ghostarchive.org/varchive/youtube/20211102/H0uerYiqD8U|archive-date=November 3, 2021|url-status=live}}{{cbignore}}</ref> 
* [[the Beatles]]<ref name="HHO"/> (including [[John Lennon]]'s solo work),<ref>{{cite web|first=Matthew|last=Parker|url=https://www.musicradar.com/totalguitar/john-lennon-sum-41-interview-314486|title=John Lennon: Sum 41 interview|work=Music Radar|date=November 29, 2010|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20230605040647/https://www.musicradar.com/totalguitar/john-lennon-sum-41-interview-314486|archive-date=June 5, 2023|url-status=live}}</ref> 
* [[Elvis Costello]],<ref name="WhibleyInsp"/> 
* [[Beastie Boys]],<ref name="WhibleyInsp"/><ref name="knac.com"/> 
* [[Run–D.M.C.]],<ref name="knac.com"/> 
* [[Rob Base and DJ E-Z Rock]],<ref name="knac.com"/> 
* [[Metallica]],<ref name="knac.com"/><ref name="WhibleyInsp">{{Cite web|first=Michiel|last=Feenstra|url=https://www.youtube.com/watch?v=Y_OOfjGzIyk|title=Sum 41's Deryck about Metallica, Beastie Boys & NOFX (and other inspirations)|website=5 Essential Tracks|date=May 21, 2017|access-date=April 3, 2022|archive-url=https://ghostarchive.org/varchive/youtube/20211102/Y_OOfjGzIyk|archive-date=November 3, 2022|url-status=live}}{{cbignore}}</ref> 
* [[Guns N' Roses]],<ref name="knac.com"/> 
* [[Iron Maiden]],<ref name="knac.com"/>
}}}}<!--End note-->
Sum 41 has inspired modern artists such as [[5 Seconds of Summer]], [[Seaway (band)|Seaway]], [[Dune Rats]], [[Marshmello]], [[PVRIS]], [[Trash Boat]], [[Neck Deep]], [[The Vamps (British band)|the Vamps]], [[Bully (band)|Bully]], [[Waterparks (band)|Waterparks]], and [[Roam (band)|Roam]].{{refn|group=note|Influenced:{{columns-list|
* [[5 Seconds of Summer]],<ref>{{cite web|first=Jessica|last=Norton|url=http://www.mtv.com/news/2102369/five-seconds-of-summer-meet-pop-punk-idols-sum-41/|title=5SOS Meet Their Idols, Get Starstuck AF|work=[[MTV]]|date=March 12, 2015|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20230424101710/https://www.mtv.com/news/obqqpm/five-seconds-of-summer-meet-pop-punk-idols-sum-41|archive-date=April 24, 2023|url-status=dead}}</ref> 
* [[Seaway (band)|Seaway]],<ref>{{Cite web|first=El|last=Corazón|url=https://www.thestranger.com/events/35633141/seaway-trophy-eyes-microwave-cant-swim-hot-mulligan|title=Seaway, Trophy Eyes, Microwave, Can't Swim, Hot Mulligan|work=[[The Stranger (newspaper)|The Stranger]]|date=December 14, 2018|access-date=January 31, 2023|archive-url=https://web.archive.org/web/20201030233715/https://www.thestranger.com/events/35633141/seaway-trophy-eyes-microwave-cant-swim-hot-mulligan|archive-date=October 30, 2020|url-status=dead}}</ref> 
* [[Dune Rats]],<ref>{{cite web|url=https://3voor12.vpro.nl/update~de1bf86f-fa7b-433e-b56f-b0d5225104d2~bks18-dune-rats-is-voor-alle-punkrockpartypeople~.html|title=BKS18: Dune Rats is voor alle punkrockpartypeople|work=3voor12|access-date=May 3, 2019|archive-url=https://web.archive.org/web/20230419125925/https://3voor12.vpro.nl/update~de1bf86f-fa7b-433e-b56f-b0d5225104d2~bks18-dune-rats-is-voor-alle-punkrockpartypeople~.html|archive-date=April 19, 2023|url-status=live}}</ref> 
* [[Marshmello]],<ref>{{cite magazine|first=Kat|last=Bein|url=https://www.billboard.com/articles/news/dance/8477016/marshmello-creates-playlist-to-his-life-video|title=Marshmello Creates the Playlist to His Life: Watch|magazine=[[Billboard (magazine)|Billboard]]|date=September 26, 2018|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20230209001423/https://www.billboard.com/music/music-news/marshmello-creates-playlist-to-his-life-video-8477016/|archive-date=February 9, 2023|url-status=live}}</ref> 
* [[PVRIS]],<ref>{{cite web|url=https://www.pressreader.com/uk/kerrang-uk/20180505/281578061284480|title=PressReader - Kerrang! (UK): 2018-05-05 - PVRIS How Sum 41 Set Lynn Gunn On Her Musical Journey|via=PressReader|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20190503103908/https://www.pressreader.com/uk/kerrang-uk/20180505/281578061284480|archive-date=May 3, 2019|url-status=dead}}</ref><ref>{{cite web|first=Jennyfer J.|last=Walker|url=https://www.kerrang.com/features/pvriss-lynn-gunn-the-10-songs-that-changed-my-life/|title=PVRIS's Lynn Gunn: The 10 Songs That Changed My Life|work=[[Kerrang!]]|date=January 23, 2019|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20210605164553/https://www.kerrang.com/features/pvriss-lynn-gunn-the-10-songs-that-changed-my-life/|archive-date=June 5, 2021|url-status=dead}}</ref> 
* [[Trash Boat]],<ref name="POPPUNKINF">{{cite magazine|first=Mackenzie|last=Hall|url=https://www.altpress.com/features/10_most_influential_bands_of_pop_punk/|title=The 10 most influential bands of pop punk|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=June 14, 2016|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20181218024610/https://www.altpress.com/features/10_most_influential_bands_of_pop_punk/|archive-date=December 18, 2018|url-status=dead}}</ref> 
* [[Neck Deep]],<ref>{{cite web|first=Timothy|last=Monger|url=https://www.allmusic.com/artist/neck-deep-mn0003188027/biography|title=Neck Deep Biography|work=[[AllMusic]]|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20230419114922/https://www.allmusic.com/artist/neck-deep-mn0003188027/biography|archive-date=April 19, 2023|url-status=live}}</ref> 
* [[The Vamps (British band)|the Vamps]],<ref>{{cite web|first=Emily|last=Brandon|url=https://ohmy.disney.com/music/2014/06/14/current-band-obsession-the-vamps/|title=Current Band Obsession: The Vamps - Disney Playlist|work=Oh My Disney|date=June 14, 2014|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20210802091212/https://ohmy.disney.com/music/2014/06/14/current-band-obsession-the-vamps/|archive-date=August 2, 2021|url-status=dead}}</ref> 
* [[Bully (band)|Bully]],<ref>{{cite magazine|first=Will|last=Richards|url=https://diymag.com/2016/08/31/bully-cover-sum-41-fat-lip|title=Bully have covered Sum 41's 'Fat Lip' - the world rejoices|magazine=[[DIY (magazine)|DIY]]|date=August 31, 2016|access-date=April 3, 2022|archive-url=https://web.archive.org/web/20210225120024/https://diymag.com/2016/08/31/bully-cover-sum-41-fat-lip|archive-date=February 25, 2021|url-status=live}}</ref> 
* [[Waterparks (band)|Waterparks]],<ref name="POPPUNKINF"/> 
* [[Roam (band)|Roam]],<ref name="POPPUNKINF"/>
}}}}<!--End note-->

==Band members==
<gallery perrow="5" caption="Sum 41 live at [[Southside Festival]] 2024" widths="180" heights="180">
Sum 41 - Southside Festival 2024 - 1DX 2908.jpg|Deryck Whibley
Sum 41 - Southside Festival 2024 - DSC2683.jpg|Dave "Brownsound" Baksh
Sum 41 - Southside Festival 2024 - 1DX 2951.jpg|Jason "Cone" McCaslin
Sum 41 - Southside Festival 2024 - DSC2943.jpg|Tom Thacker
Sum 41 - Southside Festival 2024 - 1DX 2926.jpg|Frank Zummo
</gallery>

{{col-begin}}
{{col-2}}
'''Final lineup'''
* [[Deryck Whibley]] – lead vocals, rhythm guitar (1997–2025), keyboards (2004–2025), lead guitar (1996–1997, 2006–2010),<ref name="altpress1"/> backing vocals (1996–1997), occasional drums (2001–2010)
* [[Dave Baksh|Dave "Brownsound" Baksh]] – lead guitar, backing and occasional co-lead vocals (1997–2006; 2015–2025)<ref name="Wikipedia Fact or Fiction">{{cite web|first=Graham|last=Hartmann|url=http://loudwire.com/sum-41-wikipedia-fact-or-fiction/|title=Wikipedia Fact or Fiction|website=Loudwire.com|date=November 2, 2016|access-date=March 28, 2022}}</ref>
* [[Jason McCaslin|Jason "Cone" McCaslin]] – bass, backing vocals (1999–2025)<ref name="altpress1">{{cite web|first=Annie|last=Zaleski|url=http://www.altpress.com/features/entry/it_feels_right_sum_41s_deryck_whibley_and_brownsound_discuss_reuniting|title="It feels right": Sum 41's Deryck Whibley and Brownsound discuss reuniting|publisher=altpress|date=August 14, 2015|access-date=March 28, 2022|archive-url=https://web.archive.org/web/20150816193053/http://www.altpress.com/features/entry/it_feels_right_sum_41s_deryck_whibley_and_brownsound_discuss_reuniting|archive-date=August 16, 2015|url-status=dead|df=mdy-all}}</ref>
* [[Tom Thacker (musician)|Tom Thacker]] – lead guitar, backing and occasional lead vocals (2009–2025; touring 2007–2009),<ref name="altpress1"/><ref name="auto">{{cite web|first=Helen|last=Chan|url=http://emptylighthouse.com/sum-41-overcoming-worst-preparing-comeback-1252450918|title=Sum 41: Overcoming the Worst, Preparing for a Comeback|website=Emptylighthouse.com|date=June 2, 2015|access-date=January 18, 2018}}</ref> rhythm guitar (2015–2025), keyboards (2016–2025)
* [[Frank Zummo]] – drums, occasional backing vocals (2015–2025)<ref name="altpress1"/>
{{col-2}}
'''Former'''
* [[Steve Jocz|Steve "Stevo32" Jocz]] – drums, backing and occasional lead vocals (1996–2013)<ref name="Jocz"/>
* Jon Marshall – lead vocals, rhythm guitar (1996–1997),<ref name="auto"/><ref name="Virgin France">{{cite journal|first=Marine|last=Pineau|title=Sum 41 annonce un concert en France et c'est déjà complet |journal=Virgin Radio France |date=October 7, 2015}}</ref> bass (1996)<ref>{{Cite AV media |url=https://www.youtube.com/watch?v=gTf3pAK8kbI |title=SUM 41 ORIGINAL DRUMMER STEVO 32 SECOND VIDEO ! OLD DEMOS! |date=2024-06-06 |last=((Stevo32Drums)) |access-date=2024-07-13 |via=YouTube}}</ref>
* Grant McVittie – bass, backing vocals (1996)
* Richard "Twitch" Roy – bass, backing vocals (1996–1998)<ref name="auto"/>
* [[Mark Spicoluk]] – bass, backing vocals (1998–1999)

'''Touring'''
* Matt Whibley – keyboards (2011)
* [[Darrin Pfeiffer]] – drums (2015)<ref>{{Cite web|first=Alan|last=Cross|url=https://www.ajournalofmusicalthings.com/goldfinger-drummer-darrin-pfeiffer-on-joining-sum-41/|title=Goldfinger Drummer Darrin Pfeiffer on Joining Sum 41|website=A Journal of Musical Things|date=August 26, 2015|access-date=March 28, 2022}}</ref>
{{col-end}}

===Timeline===
{{#tag:timeline|
ImageSize  = width:900 height:auto barincrement:20
PlotArea   = left:90 bottom:95 top:0 right:0
Alignbars  = justify
DateFormat = mm/dd/yyyy
Period     = from:09/28/1996 till:03/30/2025
TimeAxis   = orientation:horizontal format:yyyy
Legend     = orientation:vertical position:bottom columns:4
ScaleMajor = increment:3 start:1997
ScaleMinor = increment:1 start:1997

Colors =
 id:lvoc   value:red          legend:Lead_vocals
 id:bvoc   value:pink         legend:Backing_vocals
 id:lg     value:teal         legend:Lead_guitar
 id:rg     value:brightgreen  legend:Rhythm_guitar
 id:key    value:purple       legend:Keyboards
 id:b      value:blue         legend:Bass
 id:dr     value:orange       legend:Drums
 id:tour   value:yellow       legend:Touring_member
 id:studio value:black        legend:Studio_album
 id:EP     value:gray(0.7)    legend:EP
 id:bars   value:gray(0.95)

BackgroundColors = bars:bars

LineData =
 layer:back
  color:EP layer:back
   at:06/27/2000
  color:studio
   at:05/08/2001
   at:11/26/2002
   at:10/12/2004
   at:07/24/2007
   at:03/29/2011
   at:10/07/2016
   at:07/19/2019
   at:03/29/2024

BarData =
 bar:Jon     text:"Jon Marshall"
 bar:Deryck  text:"Deryck Whibley"
 bar:Dave    text:"Dave Baksh"
 bar:Tom     text:"Tom Thacker"
 bar:Grant   text:"Grant McVittie"
 bar:Richard text:"Richard Roy"
 bar:Mark    text:"Mark Spicoluk"
 bar:Cone    text:"Jason McCaslin"
 bar:Steve   text:"Steve Jocz"
 bar:Frank   text:"Frank Zummo"

PlotData=
 width:13 textcolor:black align:left anchor:from shift:(10,-4)
 color:lvoc
 bar:Jon     from:start till:06/01/1997 
 bar:Deryck  from:06/01/1997 till:end

 color:lg
 bar:Deryck  from:start till:06/01/1997  
 bar:Deryck  from:05/11/2006 till:06/24/2010 width:9
 bar:Dave    from:06/01/1997 till:05/11/2006 
 bar:Dave    from:08/14/2015 till:end
 bar:Tom     from:07/18/2007 till:end 

 color:rg   
 bar:Jon     from:start till:06/01/1997 width:3
 bar:Deryck  from:11/01/1996 till:12/01/1996 width:7
 bar:Deryck  from:06/01/1997 till:end width:3
 bar:Tom     from:08/14/2015 till:end width:7

 color:key
 bar:Deryck  from:03/01/2004 till:end  width:7
 bar:Tom     from:10/05/2016 till:end width:5

 color:b
 bar:Grant   from:start till:11/01/1996 
 bar:Jon     from:11/01/1996 till:12/01/1996 width:3
 bar:Richard from:12/01/1996 till:06/01/1998
 bar:Mark    from:06/01/1998 till:01/01/1999
 bar:Cone    from:01/01/1999 till:end

 color:dr
 bar:Steve   from:start till:04/18/2013 
 bar:Frank   from:07/19/2015 till:end 

 color:bvoc width:3
 bar:Steve   from:start till:04/18/2013
 bar:Deryck  from:start till:06/01/1997  
 bar:Grant   from:start till:11/01/1996 
 bar:Richard from:12/01/1996 till:06/01/1998
 bar:Dave    from:06/01/1997 till:05/11/2006 
 bar:Mark    from:06/01/1998 till:01/01/1999
 bar:Dave    from:08/14/2015 till:end 
 bar:Cone    from:01/01/1999 till:end
 bar:Tom     from:07/18/2007 till:end 

 color:tour
 bar:Tom     from:07/18/2007 till:01/01/2009 width:7
}}

==Discography==
{{Main|Sum 41 discography}}
<!-- DO NOT ADD HALF HOUR OF POWER, AS IT IS NOT A STUDIO ALBUM. -->
'''Studio albums'''
* ''[[All Killer No Filler]]'' (2001)
* ''[[Does This Look Infected?]]'' (2002)
* ''[[Chuck (Sum 41 album)|Chuck]]'' (2004)
* ''[[Underclass Hero]]'' (2007)
* ''[[Screaming Bloody Murder]]'' (2011)
* ''[[13 Voices]]'' (2016)
* ''[[Order in Decline]]'' (2019)
* ''[[Heaven :x: Hell]]'' (2024)

==Tours==
{{Col-begin}}
{{Col-2}}
'''Headlining'''
* Tour of the Rising Sum (2001)<ref>{{cite web|first=Craig|last=Seymour|url=https://buffalonews.com/news/sum-of-its-parts/article_5b6c2972-629d-52fb-9078-31fdf2149ae6.html|title=Sum Of Its Parts|work=[[The Buffalo News]]|date=August 24, 2001|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20230419114253/https://buffalonews.com/news/sum-of-its-parts/article_5b6c2972-629d-52fb-9078-31fdf2149ae6.html|archive-date=April 19, 2023|url-status=live}}</ref>
* Sum Like it Loud Tour (2002)<ref name="Sum Like it Loud Tour"/>
* Sum on Your Face Tour (2002–2003)<ref name="Sum on Your Face Tour"/>
* Go Chuck Yourself Tour (2005)<ref>{{cite web|url=https://www.ultimate-guitar.com/reviews/compact_discs/sum_41/go_chuck_yourself/|title=Go Chuck Yourself reviews|work=[[Ultimate Guitar]]|date=2005|access-date=December 20, 2023}}</ref>
* [[Screaming Bloody Murder Tour]] (2010–2013)<ref>{{cite news|title=Cancela Sum 41 sus presentaciones en México|trans-title=Sum 41 cancels its performances in Mexico|agency=[[Notimex]]|date=September 2, 2011|language=es|id={{ProQuest|887145595}}}}</ref>
* Does This Look Infected?: 10th Anniversary Tour (2012)<ref name="DTLI? 10th Anniversary"/>
* [[Don't Call It a Sum-Back Tour]] (2016–2017)<ref name="North America DCIASBT"/><ref name="Europe DCIASBT"/><ref name="Asia DCIASBT"/>
* Does This Look Infected?: 15th Anniversary Tour (2018)<ref name="Colburn"/>
* No Personal Space Tour (2019)<ref name="No Personal Space Tour"/>
* Order In Decline Tour (2019)<ref name="Order in Decline Tour"/><ref name="Order in Decline Tour2"/>
* Chuck: 15th Anniversary Tour (2019)<ref name="Order in Decline Tour"/><ref name="15th Anniversary Chuck"/>
* [[Tour of the Setting Sum]] (2024–2025)<ref name="sumfinaltour"/>
{{Col-2}}
'''Co-headlining'''
* 2004 North American Tour (with [[Good Charlotte]]) (2004)<ref name="North American Tour 2004"/>
* For One Night Only (with [[Yellowcard]]) (2007)<ref name="Yellowcard"/>
* Strength in Numbers Tour (with [[Finger Eleven]]) (2007)<ref name="chartattack"/>
* 2008 Australian Tour (with [[Pennywise (band)|Pennywise]]) (2008)<ref name="Kill Your Stereo collaborations"/>
* [[Dead Silence Tour]] (with [[Billy Talent]]) (2013)<ref name="Dead Silence Tour"/>
* 2017 Canadian Tour (with [[Papa Roach]]) (2017)<ref name="2017 Canadian Tour"/>
* We Will Detonate Tour (with [[Pierce the Veil]]) (2017)<ref name="We Will Detonate Tour"/>
* 2019 Canadian Tour (with [[The Offspring]]) (2019)<ref name="co-headlining tour The Offspring"/><ref name="co-headlining tour The Offspring2"/>
* Blame Canada Tour (with [[Simple Plan]]) (2022)<ref name="Blame Canada"/><ref name="Blame Canada 2"/>
* Let the Bad Times Roll Tour (with [[The Offspring]] and [[Simple Plan]]) (2023)<ref>{{cite web|first=Damian|last=Jones|url=https://www.nme.com/news/music/the-offspring-announce-2023-us-tour-with-sum-41-and-simple-plan-3420645|title=The Offspring announce 2023 US tour with Sum 41 and Simple Plan|work=[[NME]]|date=March 26, 2023|access-date=September 20, 2023|archive-url=https://web.archive.org/web/20230327023954/https://www.nme.com/news/music/the-offspring-announce-2023-us-tour-with-sum-41-and-simple-plan-3420645|archive-date=March 27, 2023|url-status=live}}</ref><ref>{{cite magazine|first=Neville|last=Hardman|url=https://www.altpress.com/the-offspring-2023-tour-dates-simple-plan-sum-41/|title=The Offspring, Sum 41, and Simple Plan are going on the pop-punk tour of the summer|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=March 20, 2023|access-date=September 20, 2023|archive-url=https://web.archive.org/web/20230320195328/https://www.altpress.com/the-offspring-2023-tour-dates-simple-plan-sum-41/|archive-date=March 20, 2023|url-status=live}}</ref>
{{Col-end}}
{{Col-begin}}{{Col-2}}
'''Traveling festival'''
* [[Warped Tour 2017|Warped Tour]] (2000-2001,<ref name="Vans Warped Tour 2001"/> 2003,<ref>{{cite web|author=Sheena|url=https://www.punknews.org/review/2108/warped-tour-2003-live-in-san-diego|title=Warped Tour 2003|work=Punknews.org|date=July 22, 2003|access-date=February 5, 2023|archive-url=https://web.archive.org/web/20230206054544/https://www.punknews.org/review/2108/warped-tour-2003-live-in-san-diego|archive-date=February 6, 2023|url-status=live}}</ref> 2007,<ref>{{cite magazine|url=https://www.altpress.com/a_look_back_at_warped_tour_2007/|title=A look back at Warped Tour 2007|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=March 20, 2017|access-date=February 5, 2023|archive-url=https://web.archive.org/web/20230206054544/https://www.altpress.com/a_look_back_at_warped_tour_2007/|archive-date=February 6, 2023|url-status=live}}</ref> 2010-2011,<ref>{{cite magazine|url=https://www.rollingstone.com/culture/culture-lists/photos-from-warped-tour-10772/all-american-rejects-208284/|title=Photos From Warped Tour|magazine=[[Rolling Stone]]|date=June 28, 2010|access-date=February 5, 2023|archive-url=https://web.archive.org/web/20230206054542/https://www.rollingstone.com/culture/culture-lists/photos-from-warped-tour-10772/all-american-rejects-208284/|archive-date=February 6, 2023|url-status=live}}</ref><ref>{{cite web|first=Bryne|last=Yancey|url=https://www.punknews.org/article/43039/warped-tour-2011-unveils-stage-guide|title=Warped Tour 2011 unveils stage guide|work=Punknews.org|date=June 13, 2011|access-date=February 5, 2023|archive-url=https://web.archive.org/web/20230206054543/https://www.punknews.org/article/43039/warped-tour-2011-unveils-stage-guide|archive-date=February 6, 2023|url-status=live}}</ref> 2016,<ref>{{cite web|first=Liz|last=Ramanand|url=https://loudwire.com/warped-tour-2016-jones-beach-sum-41-falling-in-reverse-motionless-in-white-more/|title=Warped Tour 2016 Hits Jones Beach: Sum 41, Falling In Reverse, Motionless In White + More|work=[[Loudwire]]|date=July 12, 2016|access-date=February 5, 2023|archive-url=https://web.archive.org/web/20230206054549/https://loudwire.com/warped-tour-2016-jones-beach-sum-41-falling-in-reverse-motionless-in-white-more/|archive-date=February 6, 2023|url-status=live}}</ref><ref>{{cite web|first=Sam|last=Blum|url=https://www.fuse.tv/2016/03/2016-vans-warped-tour-lineup-good-charlotte-sum-41-less-than-jake|title=2016 Vans Warped Tour Lineup: Good Charlotte, Sum 41, Less Than Jake & More|work=[[Fuse (TV channel)|Fuse]]|date=March 22, 2016|access-date=February 5, 2023|archive-url=https://web.archive.org/web/20160326010335/https://www.fuse.tv/2016/03/2016-vans-warped-tour-lineup-good-charlotte-sum-41-less-than-jake|archive-date=March 26, 2016|url-status=dead}}</ref> 2019<ref name="2016 Warped Tour"/>)
* Campus Invasion Tour (2001)<ref name="Campus Invasion Tour 2001"/>
* {{ill|Eastpak Antidote Tour|de|Eastpak Antidote Tour|vertical-align=sup|lt=|WD=}} (2010)<ref name="Eastpak Antidote Tour"/><ref name="Eastpak Antidote Tour2"/>
* [[Kerrang!#Kerrang! Tour|Kerrang! Tour]] (2016)<ref name="2016 Kerrang! Tour"/>
{{Col-2}}
'''Opening act'''
* Conspiracy of One Tour (for [[The Offspring]]) (2001)<ref>{{cite magazine|url=https://www.billboard.com/music/music-news/offspring-drafts-pals-for-us-tour-80246/|title=Offspring Drafts Pals For U.S. Tour|magazine=[[Billboard (magazine)|Billboard]]|date=March 28, 2001|access-date=February 5, 2023|archive-url=https://web.archive.org/web/20230206054542/https://www.billboard.com/music/music-news/offspring-drafts-pals-for-us-tour-80246/|archive-date=February 6, 2023|url-status=live}}</ref>
* Carnival of Sins Tour (for [[Mötley Crüe]]) (2005)<ref name="Carnival of Sin"/>
* Shit Is Fucked Up Tour (for [[The Offspring]]) (2009)<ref name="Shit is Fucked Up Tour"/>
* [[One More Light World Tour]] (for [[Linkin Park]]) (2017)<ref>{{cite web|first=Chad|last=Childers|url=https://loudwire.com/sum-41-deryck-whibley-asked-consider-fronting-linkin-park/|title=Sum 41's Deryck Whibley Was Asked if He'd Ever Consider Fronting Linkin Park|work=[[Loudwire]]|date=April 6, 2022|access-date=December 20, 2023|archive-url=https://web.archive.org/web/20230608062922/https://loudwire.com/sum-41-deryck-whibley-asked-consider-fronting-linkin-park/|archive-date=June 8, 2023|url-status=live}}</ref>
{{Col-end}}

==Awards and nominations==
A select list of Sum 41's awards and nominations.
{{awards table}}
!{{Abbr|Ref.|Reference}}
|-
|rowspan="3"| 2001 || Sum 41 || [[Juno Award for Breakthrough Group of the Year|Juno Award – Best New Group]]  || {{nom}}
| <ref>{{cite web|url=http://junoawards.ca/nomination/2001-best-new-group-sum-41/|title=Sum 41 Category: Best New Group Year: 2001|website=[[Juno Award|junoawards.ca]]|access-date=February 28, 2018|archive-url=https://web.archive.org/web/20230419033115/http://junoawards.ca/nomination/2001-best-new-group-sum-41/|archive-date=April 19, 2023|url-status=live}}</ref>
|-
|| "[[Makes No Difference]]" || [[MuchMusic Video Award]] – [[List of MuchMusic Video Awards for Peoples Choice: Favourite Canadian Group|People's Choice: Favorite Canadian Group]] || {{won}}
| <ref>{{Cite web|first=Jon|last=Roe|url=https://calgaryherald.com/life/swerve/canada-150-15-artists-150-canadian-songs-the-ultimate-playlist-for-the-summer-of-patriot-love|title=15 artists. 150 Canadian songs. The ultimate playlist for the summer of patriot love|work=[[Calgary Herald]]|date=June 16, 2017|access-date=March 26, 2022|archive-url=https://web.archive.org/web/20170619095937/https://calgaryherald.com/life/swerve/canada-150-15-artists-150-canadian-songs-the-ultimate-playlist-for-the-summer-of-patriot-love|archive-date=June 19, 2017|url-status=live}}</ref>
|-
|| "[[Fat Lip]]" || [[MTV Video Music Award]] – [[MTV Video Music Award|Best New Artist in a Video]] ||  {{nom}}
| <ref>{{cite web|first=Joe|last=Dangelo|url=http://www.mtv.com/news/1448645/our-lady-peace-nelly-furtado-sum41-get-muchmusic-video-awards-nods/|title=Our Lady Peace, Nelly Furtado, Sum41 Get MuchMusic Video Awards Nods|work=[[MTV]]|date=September 5, 2001|access-date=March 26, 2022|archive-url=https://web.archive.org/web/20230423180608/https://www.mtv.com/news/m800kx/our-lady-peace-nelly-furtado-sum41-get-muchmusic-video-awards-nods|archive-date=April 23, 2023|url-status=dead}}</ref>
|-
|rowspan="3"| 2002 || Sum 41 || Juno Award – Best Group || {{nom}}
| <ref name="Gate">{{cite web|first=W. Andrew|last=Powell|url=http://www.thegate.ca/junos/2002/2002-nominees.php|title=2002 Juno Nominees|work=The Gate|date=February 18, 2002|access-date=March 26, 2022|archive-url=https://web.archive.org/web/20060427041929/http://www.thegate.ca/junos/2002/2002-nominees.php|archive-date=April 27, 2006|url-status=dead}}</ref>
|-
|| ''[[All Killer No Filler]]'' || [[Juno Award for Album of the Year|Juno Award – Best Album]] || {{nom}}
| <ref name="Gate"/>
|-
|| "[[In Too Deep (Sum 41 song)|In Too Deep]]" || MuchMusic Video Award – [[List of MuchLoud Best Rock Video (MMVA Award)|MuchLoud Best Rock Video]] || {{won}}
| <ref>{{Cite web|first=Adria|last=Young|url=https://www.vice.com/en/article/retrospective-reviews-sum-41s-all-killer-no-filler/|title=Retrospective Reviews: Sum 41's "All Killer No Filler"|work=[[Vice Media|Vice]]|date=May 8, 2014|access-date=March 26, 2022|archive-url=https://web.archive.org/web/20230415160938/https://www.vice.com/en/article/rzejg3/retrospective-reviews-sum-41s-all-killer-no-filler|archive-date=April 15, 2023|url-status=live}}</ref>
|-
|rowspan="2"| 2003 || Sum 41 || [[Juno Award for Group of the Year|Juno Award – Group of the Year]] || {{won}}
| <ref name="Juno Awards 2003">{{cite web|url=http://ottawastart.com/juno.php|title=Juno Awards 2003|access-date=August 17, 2008|archive-url=https://web.archive.org/web/20091213131231/http://ottawastart.com/juno.php|archive-date=December 13, 2009|url-status=dead}}</ref><ref>{{cite web|url=http://junoawards.ca/nomination/2003-group-of-the-year-sum-41/|title=Sum 41 Category: Group of the Year Year: 2003|website=[[Juno Award|junoawards.ca]]|access-date=February 28, 2018|archive-url=https://web.archive.org/web/20230419232521/http://junoawards.ca/nomination/2003-group-of-the-year-sum-41/|archive-date=April 19, 2023|url-status=live}}</ref>
|-
|| Sum 41 || [[Kerrang!|Kerrang! Award]] – Best Live Act  || {{nom}}
| <ref name="Kerrang">{{cite web|url=http://news.bbc.co.uk/cbbcnews/hi/music/newsid_3129000/3129045.stm|title=Kerrang! awards 2003: The nominations|work=[[BBC]]|date=August 6, 2003|access-date=February 28, 2018|archive-url=https://web.archive.org/web/20230315023340/http://news.bbc.co.uk/cbbcnews/hi/music/newsid_3129000/3129045.stm|archive-date=March 15, 2023|url-status=live}}</ref>
|-
|rowspan="2"| 2004 || ''[[Does This Look Infected?]]'' || [[Juno Award for Rock Album of the Year|Juno Award – Rock Album of the Year]] || {{nom}}
| <ref>{{cite web|url=https://junoawards.ca/awards/past-winners-nominees/?search_year_val1=2004&search_year_val2=2005&search_category_val=285&award_name=&search_wins_val=no&tag_search_val=&submit=submit|title=Past Nominess + Winners 2004|website=[[Juno Award|junoawards.ca]]|access-date=February 8, 2021|archive-url=https://web.archive.org/web/20230415160939/https://junoawards.ca/awards/past-winners-nominees/?search_year_val1=2004&search_year_val2=2005&search_category_val=285&award_name=&search_wins_val=no&tag_search_val=&submit=submit|archive-date=April 15, 2023|url-status=live}}</ref>
|-
|| Sum 41 || [[Woodie Awards|Woodie Award]] – The Good Woodie (Greatest Social Impact) || {{won}}
| <ref>{{cite magazine|url=https://www.billboard.com/music/music-news/mtvu-woodie-awards-winners-65803/|title=mtvU Woodie Awards Winners|magazine=[[Billboard (magazine)|Billboard]]|date=November 3, 2004|access-date=March 26, 2022|archive-url=https://web.archive.org/web/20230415160944/https://www.billboard.com/music/music-news/mtvu-woodie-awards-winners-65803/|archive-date=April 15, 2023|url-status=live}}</ref><ref name="Woodie">{{cite web|url=http://www.jambase.com/Articles/7256/MTVU-WOODIE-AWARDS|title=MTVU Woodie Awards|website=Jambase.com|access-date=March 27, 2022|archive-url=https://web.archive.org/web/20080706151835/http://www.jambase.com/Articles/7256/MTVU-WOODIE-AWARDS|archive-date=July 6, 2008|url-status=dead}}</ref>
|-
| rowspan="3"| 2005 || Sum 41 || Juno Award – Group of the Year || {{nom}}
| <ref>{{cite web|url=https://junoawards.ca/awards/past-winners-nominees/?search_year_val1=2004&search_year_val2=2005&search_category_val=123&award_name=&search_wins_val=no&tag_search_val=&submit=submit|title=Past Nominess + Winners 2005|website=[[Juno Award|junoawards.ca]]|access-date=February 8, 2021|archive-url=https://web.archive.org/web/20230415160939/https://junoawards.ca/awards/past-winners-nominees/?search_year_val1=2004&search_year_val2=2005&search_category_val=123&award_name=&search_wins_val=no&tag_search_val=&submit=submit|archive-date=April 15, 2023|url-status=live}}</ref>
|-
|| ''[[Chuck (Sum 41 album)|Chuck]]'' || Juno Award – Rock Album of the Year || {{won}}
| <ref>{{cite web|url=http://junoawards.ca/nomination/2005-rock-album-of-the-year-sponsored-by-siriusxm-canada-sum-41/|title=2005 Rock Album of the Year|website=[[Juno Award|junoawards.ca]]|access-date=February 28, 2018|archive-url=https://web.archive.org/web/20230419190036/http://junoawards.ca/nomination/2005-rock-album-of-the-year-sponsored-by-siriusxm-canada-sum-41/|archive-date=April 19, 2023|url-status=live}}</ref>
|-
|| "[[Pieces (Sum 41 song)|Pieces]]" || MuchMusic Video Award – People's Choice: Favourite Canadian Group || {{nom}}
| <ref>{{cite web|url=http://www.muchmusic.com/events/mmva05/winners/|title=MMVA 05|website=[[Much (TV channel)|MuchMusic.com]]|access-date=February 8, 2021|archive-url=https://web.archive.org/web/20060115194334/http://www.muchmusic.com/events/mmva05/winners/|archive-date=January 15, 2006|url-status=dead}}</ref>
|-
|rowspan="2"| 2008 || "[[With Me (Sum 41 song)|With Me]]" || MuchMusic Video Award – [[2008 MuchMusic Video Awards|MuchLOUD Best Rock Video]] || {{nom}}
| <ref>{{cite web|url=http://www.muchmusic.com/events/mmva08/nominees/|title=MMVA08 nominees|website=[[Much (TV channel)|MuchMusic.com]]|access-date=February 8, 2021|archive-url=https://web.archive.org/web/20081230005305/http://www.muchmusic.com/events/mmva08/nominees/|archive-date=December 30, 2008|url-status=dead}}</ref>
|-
|| ''[[Underclass Hero]]'' ||  Juno Award – Rock Album of the Year || {{nom}}
| <ref>{{cite web|url=https://junoawards.ca/awards/past-winners-nominees/?search_year_val1=2008&search_year_val2=2009&search_category_val=285&award_name=&search_wins_val=no&tag_search_val=&submit=submit|title=Past Nominess + Winners 2008|website=[[Juno Award|junoawards.ca]]|access-date=February 8, 2021|archive-url=https://web.archive.org/web/20230419190039/https://junoawards.ca/awards/past-winners-nominees/?search_year_val1=2008&search_year_val2=2009&search_category_val=285&award_name=&search_wins_val=no&tag_search_val=&submit=submit|archive-date=April 19, 2023|url-status=live}}</ref>
|-
|2012 || "[[Blood in My Eyes]]" || [[Grammy Award for Best Hard Rock/Metal Performance]] || {{nom}}
| <ref name="grammy awards 2012"/><ref name="grammy awards 2012 2"/><ref name="grammy awards 2012 3"/>
|-
|rowspan="2"| 2016 || Sum 41 || [[Kerrang! Awards|Kerrang! Award]] – Best Live Act || {{nom}}
| <ref name="kerrang awards">{{cite web|first=Samantha|last=Curreli|url=https://www.theaquarian.com/2016/10/12/an-interview-with-sum-41-crystal-clear/|title=An Interview With Sum 41: Crystal Clear|work=[[The Aquarian Weekly]]|date=October 12, 2016|access-date=March 26, 2022|archive-url=https://web.archive.org/web/20230419114254/https://www.theaquarian.com/2016/10/12/an-interview-with-sum-41-crystal-clear/|archive-date=April 19, 2023|url-status=live}}</ref>
|-
|| Sum 41 || [[Kerrang! Awards|Kerrang! Award]] – Best Fanbase  || {{nom}}
| <ref name="kerrang awards"/>
|-
|rowspan="3"| 2017 || [[Frank Zummo]] || [[Alternative Press Music Awards]] – Best Drummer || {{won}}
| <ref>{{cite magazine|first=Kristine|last=Cannon|url=http://www.altpress.com/news/entry/sum_41_frank_zummo_best_drummer_2017_apmas|title=Sum 41's Frank Zummo wins Best Drummer at the 2017 APMAs.|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=July 17, 2017|access-date=January 30, 2023|archive-url=https://web.archive.org/web/20170722074754/http://www.altpress.com/news/entry/sum_41_frank_zummo_best_drummer_2017_apmas|archive-date=July 22, 2017|url-status=dead}}</ref><ref name="APMAS2017">{{cite web|first=Zenae|last=Zukowski|url=https://metalinsider.net/video/winners-of-the-2017s-alternative-press-music-awards-include-korn-despite-performance-cancelation|title=Winners of the 2017's 'Alternative Press Music Awards' include KoRn, despite performance cancelation|work=Metal Insider|date=July 18, 2017|access-date=January 30, 2023|archive-url=https://web.archive.org/web/20230201214830/https://metalinsider.net/video/winners-of-the-2017s-alternative-press-music-awards-include-korn-despite-performance-cancelation|archive-date=February 1, 2023|url-status=live}}</ref>
|-
|| "[[Fake My Own Death]]" || [[Alternative Press Music Awards]] – Best Music Video  || {{nom}}
| <ref name="APMAS2017"/><ref name=APMAS20172>{{cite magazine|first=Rabab|last=Al-Sharif|url=http://www.altpress.com/news/entry/apmas_2017_nominees|title=Nominees for 2017 APMAS announced.|magazine=[[Alternative Press (magazine)|Alternative Press]]|date=April 25, 2017|access-date=January 30, 2023|archive-url=https://web.archive.org/web/20170427104128/http://www.altpress.com/news/entry/apmas_2017_nominees|archive-date=April 27, 2017|url-status=dead}}</ref>
|-
|| Sum 41 || [[Alternative Press Music Awards]] – Artist of the Year  || {{nom}}
| <ref name="APMAS2017"/><ref name=APMAS20172/>
|-
|2020
|| ''[[Order in Decline]]'' ||  Juno Award – Rock Album of the Year || {{nom}}
| <ref>{{cite web|url=https://www.cbc.ca/music/junos/news/alessia-cara-and-tory-lanez-lead-the-2020-juno-nominations-1.5436386|title=Alessia Cara and Tory Lanez lead the 2020 Juno nominations|work=[[Canadian Broadcasting Corporation|CBC]]|date=January 28, 2020|access-date=January 30, 2023|archive-url=https://web.archive.org/web/20230412032309/https://www.cbc.ca/music/junos/news/alessia-cara-and-tory-lanez-lead-the-2020-juno-nominations-1.5436386|archive-date=April 12, 2023|url-status=live}}</ref><ref>{{cite web|first=Sarah|last=Murphy|url=https://exclaim.ca/music/article/here_are_the_2020_juno_awards_nominees|title=Here Are the 2020 Juno Awards Nominees|work=[[Exclaim!]]|date=January 28, 2020|access-date=June 16, 2022|archive-url=https://web.archive.org/web/20230419114256/https://exclaim.ca/music/article/here_are_the_2020_juno_awards_nominees|archive-date=April 19, 2023|url-status=live}}</ref>
{{End}}

==Notes==
{{reflist|group=note}}
{{notelist}}

==References==
=== Citations ===
{{Reflist}}

=== Sources ===
* {{cite book |last1=Whibley |first1=Deryck |title=Walking Disaster: My Life Through Heaven and Hell |date=8 October 2024 |publisher=Simon and Schuster |location=New York |isbn=978-1-6680-4501-5 |url=https://books.google.com/books?id=e4ogEQAAQBAJ |language=en}}

==External links==
{{Sister project links|d=Q483558|n=no|b=no|v=no|voy=no|wikt=no|s=no|m=no|mw=no|species=no}}
* {{Official website}}
* {{allMusic}}
* [https://canadianbands.com/artists/sum-41/ CanadianBands.com entry]

{{Sum 41}}
{{Authority control}}
{{Good article}}

[[Category:Sum 41| ]]
[[Category:1996 establishments in Ontario]]
[[Category:2025 disestablishments in Ontario]]
[[Category:Canadian alternative metal musical groups]]
[[Category:Canadian pop punk groups]]
[[Category:Canadian punk rock groups]]
[[Category:Skate punk groups]]
[[Category:Juno Award for Group of the Year winners]]
[[Category:Kerrang! Awards winners]]
[[Category:Musical groups established in 1996]]
[[Category:Musical groups disestablished in 2025]]
[[Category:Musical groups from the Regional Municipality of Durham]]
[[Category:Canadian musical quartets]]
[[Category:Ajax, Ontario]]
[[Category:Articles which contain graphical timelines]]
[[Category:Hopeless Records artists]]
[[Category:Rise Records artists]]
[[Category:Juno Award for Rock Album of the Year winners]]