The Hills star hits the beaches of Mexico with her on-again beau. Plus: Britney Spears, Halle Berry, Chris Brown and more

BALANCING ACT

All eyes on her! Paris Hilton is the center of attention while hosting a party at nightclub mur.mur in Atlantic City's Borgata Hotel, Casino & Spa on Saturday. The heiress grooved to tunes like Lady Gaga's "Poker Face" and Journey's "Don't Stop Believing."