Sum 41 was a Canadian rock band from Ajax, Ontario, formed in 1996. Known for their energetic blend of punk rock and alternative metal, their final lineup featured Deryck Whibley, Dave Baksh, Jason McCaslin, Tom Thacker, and Frank Zummo. The band achieved mainstream success with their 2001 debut album, All Killer No Filler, which included the hit single Fat Lip. Over their career, they released eight studio albums and are celebrated for tracks like In Too Deep, Still Waiting, and Pieces. Sum 41 was recognized for their high-energy live shows and extensive world tours. They won two Juno Awards, including Group of the Year, and were nominated for a Grammy Award. The band disbanded in 2025 after a final world tour and an induction into the Canadian Music Hall of Fame, leaving a lasting impact on the punk and alternative rock scenes.