Sum 41 is a Canadian alternative rock band from Ajax, Ontario. The current members are Deryck Whibley (lead vocals, guitar, keyboards), Cone McCaslin (bass guitar, backing vocals), and Steve Jocz (drums, percussion, and backing vocals).
In 1999, the band signed an international record deal with Island Records. Since then, the band has released four studio albums, all of which have been certified platinum in Canada. Their most successful album to date is All Killer No Filler, which is certified 3x platinum in Canada and platinum in the United States. The album was fueled by the single "Fat Lip", which reached the top position on the Billboard Modern Rock chart, making it the band's most successful single. The second single off the album, "In Too Deep", reached number-ten on the Modern Rock chart.