EMMA’S MOMENT: Emma Watson showed up fashionably late to The Cinema Society screening of her new film “The Perks of Being a Wallflower,” at the Crosby Street Hotel Thursday evening. Quickly making her way through the press line, she said she won’t be making the trip to Paris or Milan this season for the collections, noting “that it’s fun and I love fashion but there’s just a lot of stuff involved to get there.” Watson was joined at the screening, also hosted by Lancome and Nylon magazine, by Michael Stipe, Ed Westwick, Kelly Klein and Ellen von Unwerth.