Spotted: Our favorite Upper East Side duo, back on their home turf. After shooting the first part of Season 4 in the city of lights, Gossip Girl stars Blake Lively and Leighton Meester are again taking to the streets of New York in style. Paris has seemed to have had a lasting effect on Blair as she sports an alluring Gucci leopard print sheath, while Serena shows off her mile-long legs in a bohemian Diane von Furstenberg mini-dress. We also get a first look at Nate's new ladyfriend, played by Katie Cassidy, so now there's another wardrobe for us to lust after! Click on the gallery to see more of the cast’s N.Y.C. style.