``Star Wars'' star Natalie Portman is convinced her shaved head makes her look like a terrorist. The itty-bitty actress, 24, who lopped off her lush locks for the upcoming ``V for Vendetta,'' told Newsweek she suspects her chrome dome was the reason New York's finest pulled her over by the Midtown Tunnel the other day. ``I've never had that happen to me before,'' the Harvard grad confessed to the weekly news magazine. ``It's supposedly random . . . My registration was expired because I had been out of town, and it was my first day back. I'd been in Israel...