Spears rings in the New Year in Sin City. Plus: Hilary Duff, Mandy & Wilmer and more
Credit: Seth Browarnik/WireImage
Updated: Monday Jan 01, 2007 | 06:00 AM EST
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Also in Miami, Wilmer Valderrama pipes up as the host of karaoke night at Mokai on Thursday. Like his ex Lohan, Valderrama is in town to reign over New Year's Eve festivities, hosting a party at Mansion nightclub.
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