It was a pretty lucky night for Supergrass' covers-only Zappa-nodding side-project to bring their "(You Gotta) Fight for Your Right (To Party!)" to Late Night television. They did the performance for Letterman Wednesday during the (then) height of this Conan Vs. Leno business. Gaz wore a skirt, no doubt inspired by the night's first guest Kiefer Sutherland. (Incidentally, Letterman was ...