Spears rings in the New Year in Sin City. Plus: Hilary Duff, Mandy & Wilmer and more
Credit: sara jaye weiss
Updated: Monday Jan 01, 2007 | 06:00 AM EST
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Hilary and Haylie Duff, who both recently split from their boyfriends, kick off 2007 at Mansion in Miami, where they partied with a bevy of gal pals.
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