Paris, in Cannes, is either crying here or showing off a new Paris Hilton signature watch. She’s so mercurial, it’s hard to tell. What is known is that she was a no-show at the premiere of her movie National Lampoon’s Pledge This!, in which she stars as a sorority president at South Beach University. The straight-to-video film also stars Simon Rex and Randy Spelling. She said she “snubbed my own premiere” because the producers added a lot of female nudity in post without consulting her. “I wanted to do something where I’d be taken seriously,” she said, “and they added a load of scenes with naked girls.” Damn them. We can only assume she felt that if anyone was going to be naked it should be her, because she’s good at that. But in keeping with her goal to be taken seriously as an actress, her next project will be the comedy Bottom’s Up, opposite Jason Mewes as a midwest bartender who moves to Hollywood. Also on the heiress’s busy to-do list: getting along with Nicole Richie and getting it on with Kimberly Stewart.