Spears rings in the New Year in Sin City. Plus: Hilary Duff, Mandy & Wilmer and more
Updated: Monday Jan 01, 2007 | 06:00 AM EST
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Mary-Kate Olsen takes her recent platinum locks back to their honey-blonde roots in Los Angeles, where she debuted her toned-down look during a Thursday shopping excursion on Melrose Avenue.
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