In this 100% fictional film, in which not a single performer plays "Himself" nor "Herself" but the two lead performers use their own name as a character, a singer named Bonnie Baker (Bonnie Baker, with a strip-tease singing voice auditions for a job singing with orchestra of Luke Laramie (Albert Dekker)), but his taste runs to blondes and Bonnie, at the moment is a brunette. Meanwhile, Luke goes to the weight-reducing sanitarium run by Dr. Calonna (Jerry Colonna), hoping to lose some weight in order to get a spot on a radio program sponsored by the maker of a non-fattening food product. Dyeing her hair from brunette to blonde, Bonnie, a fictional character played by a singer with the same name, and her agent, "Death Valley Joe" Frink (Edward Everett Horton), follow Luke to the screwy sanitarium, run like a nightclub and a summer resort by Colonna and his lovely nurse, Miss Jones (Lillian Cornell), who primarily sings and dances.