PHOTOS: Holly Madison's Sin City Birthday

By:OK! Staff

Dec. 5 2009, Published 8:12 a.m. ET

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Playboy bunny-turned-reality star-turned Vegas showgirl Holly Madison showed off the ample assets that made her a fave of Hugh Hefner when she arrived at Jet Nightclub in Las Vegas on Friday night for an early birthday party. Holly doesn't actually turn 30 until Dec. 23 — Her breasts, however, are a couple decades younger.