Sum 41 is a Canadian punk rock band from Ajax, Ontario, Canada, active since 1996. The current members, as of February 2017, are Deryck Whibley (lead vocals, rhythm guitar), Jason McCaslin (bass guitar, backing vocals), and Tom Thacker (lead guitar, backing vocals, keyboard) and Frank Zummo (drums). They've released six studio albums as of February 2017.
Sum 41 released their debut album, All Killer No Filler, in 2001 and achieved mainstream success through the album's first single, "Fat Lip", which reached number-one on the Billboard Modern Rock Tracks chart; it remains the band's most successful single to date. As of February 2017