Juno Award-winning Canadian rock outfit Sum 41 hit the worldwide radar in 1996 after their hometown of Ajax, Ontario, proved unable to fully contain the foursome's mixture of arena-sized riffing, hip-hop poses, and crass humour. Their breakthrough major-label debut, 2001's All Killer No Filler, featured the chart-topping MTV hit "Fat Lip" and its follow-up "In Too Deep." From there, the band's mischievous pop-punk style was steadily hardened with darker, world-weary lyrics and a heavier, metal-inspired attack.