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

TEST RUN

A pregnant Tori Spelling gets ready for baby by carting pooch Mimi La Rue around Los Angeles on Sunday. The actress recently revealed to PEOPLE that she and hubby Dean McDermott are expecting a boy, whose middle name will be Aaron, in honor of Spelling's late father, Aaron Spelling.