DJ Pauly D stopped by the Rolling Stone offices to debrief us on the drama ahead as the Jersey Shore crew returns to their original stomping grounds in Seaside Heights, New Jersey for the show's third season, which premiered last night. Get the lowdown on how well new cast member Deena fits in, what exactly a "grenade whistle" is (and whose brainstorm it was) and what the international DJ has to say about the tracks he's heard from Britney Spears' new album. Hint: You won't be disappointed.