Lucy and the Diamonds
Dianne Steinberg and trio Starguard in the 1978 stinkfest Sgt. Pepper's Lonely Hearts Club Band. In the movie, Lucy basically serves whatever role her boss, Big Deal Records head B. D. Brockhurst/Hoffler (Donald Pleasence) wants: chauffeur, photographer, hostess, etc. What the hell kind of contract did she sign?
See also Future Villian Band