With her pooch in tow, the Gossip Girl star celebrates her 21st b-day on the New York City set of her show. Plus: Ashlee Simpson, Lindsay Lohan, Paris Hilton and more


Paris Hilton comes prepared for her day in the sun! The heiress keeps her cool while debuting her latest business venture – a hair extension headband called The Bandit – during a party Saturday at a private house in Malibu.