"What We're All About" is a song recorded by Sum 41. It was released in April 2002 as a single and taken from the Spider-Man movie soundtrack. Kerry King of the thrash metal band Slayer is featured in the music video and performs the guitar solo in the song. This is a reworked version of "Dave's Possessed Hair/It's What We're all About" that appeared on the band's first EP, Half Hour of Power. Part of the first verse is rapped in the beginning of the Fat Lip music video. The song segues into the 55-second instrumental track, "Ride the Chariot to the Devil", on the EP version of the song.
The music video was directed by Marc Klasfeld and premiered in mid-2002. It features the band playing upside-down with their instruments chained to the roof as they perform on the rooftop to the crowd below. Throughout the video, various clips of the Spider-Man movie play, and in the middle of the performance, King appears and performs his guitar solo.