Star Tracks for Dec. 19, 2006

The Simple Life Star revs up for the holidays with a party thrown by BFF Paris Hilton. Plus: Beyoncé, Katie Holmes and more

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CAR WASH

Even stars clean out their cars! Joaquin Phoenix gets a helping hand from a female companion as he hoses down his Lexus (after getting some shoes and a skateboard out of the way) at an L.A. gas station on Saturday.