Edited by Alex Massaad from sources at MTV (who cannot write good copy to save their life)

No one was prepared for Mötley Crüe drummer Tommy Lee to take the stage with Canadian sensation Deadmau5 to close out the night. The two began the set with a treat fans have come to love WMC for, the debut of a brand-new song (so new that it's still untitled!). Lee departed after this initial song, and the 'Mau5 launched into an hour and 40 minutes of hits, including his own mix of Rage Against the Machine, "Strobe" and his biggest fan favorite "Ghosts 'N Stuff" (featuring Rob Swire). Deadmau5 had the crowd in a fit of laughter when he killed the music and emitted the death sound effect from "Super Mario Brothers." Game over!