Trying on different hats was a running theme along Lanvin’s front row. Clotilde Courau, still buzzing from her recent guest appearance at the Crazy Horse cabaret, said she would start shooting next week on “a wacky sitcom about a young director who is trying to make his film.” She will play both a fictional character and herself in the Canal Plus series, which will also star Monica Bellucci and Vincent Cassel. Dita Von Teese is preparing to divulge her beauty secrets in a book due out next year. “I do all my own hair and makeup for red carpet and for events, and I have to break it down step by step, so it’s a big process,” she explained. Duran Duran keyboardist Nick Rhodes, in town to play at a Fendi party Sunday, said he could see himself designing his own line. “I think by now I’ve seen enough of it that I could probably cut a few things on the bias,” he said. Jade Jagger said she was gearing up for two new store openings in Goa and New York. Janet Jackson swept into the show at the last minute, surrounded by hefty security detail.