Watch the whole sideshow after the jump.
Video 1: In which Harmonix's John Drake, Alex Rigopulos and others play Lady Gaga's "Poker Face." Or, rather, the Eric Cartman remix of Lady Gaga's "Poker Face." So, in summation, the Harmonix cover of the Eric Cartman cover of Lady Gaga's "Poker Face."
Video 2: In which the internet's Veronica Belmont slaps a mean bass to Elvis Costello's "Pump it Up." Is it particularly bizarre? No -- but it is solid proof that Veronica Belmont is a dirty, dirty song stealer.
Video 3: In which a man becomes so overwhelmed with emotion while performing No Doubt's "Just a Girl" that he removes his shirt, exposing himself to the audience present at the event, and now, to everyone reading this post. Our suggestion for this gentleman's No Doubt cover band is, of course, No Shame.