3OH!3

Hometown: Boulder, CO
Why they matter: Rapping college pals Nathaniel Motte and Sean Foreman have turned into a pop phenomenon, topping the charts with "Don't Trust Me," their inescapable, especially bratty ode to ladies with loose morals. "Don't trust a ho," goes the obscenely catchy chorus.
You should know: This is a big homecoming show for the duo who attended the University of Colorado in nearby Boulder. So big that they're playing their Saturday headlining slot at the Vans Warped Tour in Long Island, NY, then jetting across the country especially for their Sunday Mile High set.