Even by Rudolph’s standards, the music performances in this rollicking mainstream comedy are off the charts. Meat Loaf stars a savant Texan who becomes a jack-of-all-trades for singers on the road while he and groupie Kaki Hunter yearn to meet their fave, Alice Cooper. Also on the foot-stompin’ bill: Deborah Harry and Blondie, Roy Orbison, Ramblin’ Jack Elliott, Merle Kilgore, Asleep at the Wheel, The Pleasant Valley Boys, and Hank Williams Jr. and the Bama Band.