We hope y'all had a fun New Year's, but no one knows how to celebrate better than celebrities! What were some of our favorite stars up to?

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Paris and Nicky partied it up in Vegas at LAX. Hey, (Hilton) girls just wanna have fun!

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Our favorite rehabber LiLo was in Italy for NYE, with none other than Heroes hottie Hayden Panettiere!

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Stavros wasn't with Paris or Lindsay - but he clearly was having a blast at club Posh in Brazil!

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Vanessa Hudgens decided to see a movie with mom instead of partying.

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Nicole and Joel also opted for a mellow outing, strolling around West Hollywood during the day...

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And don't forget Christina Milian hitting Miami beach before the nighttime festivities - she looked hot hot hot!