Shop Boyz are banging heads with their out-of-nowhere hip-hop smash "Party Like a Rockstar" ? three Atlanta rappers chanting, "t-t-t-totally, dude!" over a Slash-style guitar loop and cheap booty-clap beats. The Boyz call their style "hood rock," which probably just means they're looking to pick up some hot Fall Out Boy groupies. But they boast about their wallet chains and skull belts, while "tri...