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Spears rings in the New Year in Sin City. Plus: Hilary Duff, Mandy & Wilmer and more

LOUD AND CLEAR photo | Wilmer Valderrama

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LOUD AND CLEAR

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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Credit: Seth Browarnik/WireImage

Updated: Monday Jan 01, 2007 | 06:00 AM EST

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