STILES SET: “It was very chic and very New York,” said Julia Stiles, describing the Tracy Reese show Monday afternoon. Stiles also attended Monique Lhuillier’s and Cynthia Rowley’s shows and is gearing up to appear in a Broadway show, “Fat Pig,” (“Somehow not too appropriate for fashion week,” she joked) in March. She plays Josh Hamilton’s ex-girlfriend, and the cast also includes Dane Cook. Stiles was seated with Gabrielle Union and NBC’s Natalie Morales at the show. Morales, who said she’ll also be attending Nanette Lepore’s show this week, added that she celebrated Valentine’s Day on Sunday night when she went out for dinner with her children. “I’ll be cooking tonight,” said the “Today” show star.