Sum 41 is a Canadian rock band that was formed in 1996 in Ajax, Ontario. The band's lineup consists of lead vocalist and rhythm guitarist Deryck Whibley, lead guitarist Dave Baksh, bassist and backing vocalist Jason "Cone" McCaslin, and drummer Frank Zummo. Sum 41 gained popularity in the early 2000s with their energetic and punk-influenced sound.

One of their most successful albums is "All Killer No Filler," released in 2001, which includes hit singles like "Fat Lip" and "In Too Deep." The band's music often combines elements of punk rock, alternative rock, and pop punk. Over the years, Sum 41 has released several albums, including "Does This Look Infected?" (2002), "Chuck" (2004), "Underclass Hero" (2007), and more.

Sum 41's style has evolved over time, incorporating different influences and experimenting with their sound. They have maintained a dedicated fan base and continue to tour and release new music.