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

SHAPING UP

Gwyneth Paltrow leaves a London gym looking refreshed on Monday. The actress has said that "a lot of working out" has helped her lose her baby weight from 8-month-old son Moses.