Lively sports a chic printed dress while arriving to the Gossip Girl set in N.Y. Plus: Cameron Diaz, Audrina Patridge and more

PERFECT 'MATCH'

Hours before defeating France's Stephane Robert in three sets, Andy Roddick hydrates for the U.S. Open on Monday – and celebrates his 28th birthday! – alongside model wife Brooklyn Decker in N.Y.C.