Gossip Girl Goosed!

No Richard Simmons in sight, but they were still sweatin' to the oldies on Monday night as DJ Paul Sevigny spun vintage tunes for a sticky crowd on the rooftop of Longchamp's Soho store. For the handbag giant's 60th anniversary, Susan Sarandon, Julianne Moore, Brooke Shields, and her Lipstick Jungle co-star Lindsay Price bore the heat like pros. "I've willed my sweat glands to turn off," joked Price. Inside were cooler climes and the work of artist Jean-Luc Moerman, commissioned to gussy up both the store and a collection of bags with his trademark swirls and scribbles. His pièce de résistance, a giant robot sculpture, held court on the second floor. But George Wayne preferred flesh to fantasy. The catty Vanity Fair columnist snuck up behind Gossip Girl's Leighton Meester for a derriere squeeze. "This is amazing," he concluded. "Thanks, it's silicone," deadpanned the actress, adding afterward, "That was really sweet in the weirdest way."