It's a Celebrity B-Day Bonanza!

From Paris's Sin City bash to Jennifer's dress-up celebration, see the weekend celebrations that took the cake!

PARIS HILTON

Better late than never! The heiress, who turned 29 on Feb. 17, finds herself the center of a Sin City bash Saturday night at TAO nightclub in The Venetian. Hilton, who partied alongside beau Doug Reinhardt and mom Kathy (not pictured), capped off the evening by blowing out the candles on a sweet rose-adorned cake.