“Gossip Girl” star Ed Westwick headed to the Half King bar after the Tommy Hilfiger show on Thursday, where he sat front row with Hayden Panettiere, Rosario Dawson, Ashley Olsen and an annoyed-looking Penn Badgley. Westwick playfully sparred with the bartender, because, said a spy, “Stevie Ray Vaughn was on and he wanted to listen to The Beatles.” But the “boisterous” actor ended up having one drink and going home, because, according to his rep, “his parents were in town.” Meanwhile, Panettiere and some friends had dinner at Koi after the Hilfiger show.