Sum 41 is a Juno Award-Winning Canadian pop punk band from Ajax, Ontario. The current members are Deryck Whibley (lead vocals, guitar, keyboard/piano), Cone McCaslin (bass/vocals), and Steve Jocz (drums/vocals).

The band was formed on the 41st day of summer (hence the name Sum 41).

Underclass Hero is Sum 41's first concept album, fifth overall studio album and first release without former guitarist Dave Baksh.

Underclass Hero marks a step in a bold new direction for the group, whose three full length album's, 2001's All Killer, No Filler, 2002's, Does this Look Infected and 2004 Chuck have sold over 7 million units worldwide. 'You Can't help buy grow a little', says Whibley about the band's musical and lyrical maturity. 'We now see the artistic side of music. We wanted to make this the most artistic punk-rock record we could. We approach music differently now. Things now have a purpose. We care about the craft of it now.' The is Sum 41, better than ever...and this time no regrets.
如果你喜歡Sum 41的專輯《Underclass Hero》里的歌曲，可以把下面的歌曲連接發給你的朋友:
1.Underclass Hero - Sum 41
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2.Walking Disaster - Sum 41
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3.Speak Of The Devil - Sum 41
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4.Dear Father - Sum 41
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5.Count Your Last Blessings - Sum 41
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6.Ma Poubelle - Sum 41
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7.March Of The Dogs - Sum 41
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8.The Jester - Sum 41
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9.With Me - Sum 41
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10.Pull The Curtain - Sum 41
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11.King Of Contradiction - Sum 41
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12.Best Of Me - Sum 41
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13.Confusion And Frustration In Modern Times - Sum 41
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14.So Long Goodbye - Sum 41
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15.Look At Me (Hidden Track) - Sum 41
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