"Underclass Hero" is the first single from Sum 41's fourth studio album Underclass Hero. It was officially released on May 15, 2007. The song in its entirety was leaked on April 23 from a 91X podcast interview with Deryck Whibley. It was confirmed on Sum 41's official site that this is the opening track for the album. It is now one of the songs on their MySpace page. The song is also available on iTunes and other digital music suppliers as a digital single, both in Canada and The United States. Additionally, the song is featured in the EA Sports game Madden 08 and Sony's NBA 08."Underclass Hero" was written by Deryck Whibley as a theme of "us against them," similar to their previous lyrics. Although "Underclass Hero" is written from a different angle, as the song refers prominently to society and the struggle of "high-class versus the underclass" instead of "youth against adults" as in All Killer No Filler. The song also features the more classic punk-rock themes of anti-establishment. This is the theme song for MTV's Crash My School.Sum 41's video for “Underclass Hero” was premiered May 29, 2007 on their official website. It features the band playing behind a large group of teenagers, fireworks, a marching-band and bonfire, supposedly a pre-high school pep rally for a football game with a mascot, which represented the anarchy symbol. The video was released on May 31, 2007 on Total Request Live at MTV for its worldwide launch. The video was co-directed by Marc Klasfeld and Sum 41 drummer, Steve Jocz. This is the band's first video without former guitarist Dave Baksh, who left the band the year prior.