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Who: Mia Moretti
Why: There are D.J.s that plug in their iPhone to some speakers and look pretty by the bar (we won't name names), and then there are the spinners who actually have a monster stash of vinyl and turntables—and aren't afraid to use 'em. Case becomes point with Mia Moretti, who isn't just one of the beautiful girls that can't actually mix. Not that she's not a looker; the East Village gal with the consonance-blessed name gets party photogs snapping with her Chloe Sevigny- but-happy looks and Katy Perry meets Opening Ceremony style. Speaking of Katy Perry, this former Paper cover-girl scored a top 10 Billboard dance hit with her raucous remix of that singer's party anthem "Hot'N'Cold." Did we mention Moretti played at Chelsea Clinton's wedding? Now you know!