GREEN SLEEVES: Amidst a sea of black-clad editors, it was easy to spot Salma Hayek at Balenciaga. “He loves me in green,” she said, referring to her plunging jersey top and motioning towards her new hubby, PPR honcho Francois-Henri Pinault. Hayek, who just wrapped up shooting “Cirque du Freak,” said she’s in negotiations for his next movie project. “It’s a very big family comedy,” she said. More wrenching roles have been the order of the day for Charlotte Gainsbourg. “I just finished a film with Lars von Trier,” she said. The title? “Antichrist,” she deadpanned. Gainsbourg is also in “Persécution,” currently filming in Paris. Petite actress Melanie Laurent, having just wrapped Quentin Tarantino’s “Inglourious Basterds,” said she’s headed to New York and will test her pipes with her first album, with Lou Reed’s manager Tom Sarig. “It’s rock, but not rock-rock,” she said. Meanwhile, singer-songwriter Camille Dalmais, better known as just Camille, said she’s writing music for her first soundtrack. “It’s a film about Man Ray,” she said.