“The Buddy Holly Story” starring pre-crash Gary Busey - a really well-done movie - and Gary Busey does his own very-well-done stuff on stage. Worth seeing.
https://www.youtube.com/watch?v=ItmM3pkY4MY
“The Buddy Holly Story” starring pre-crash Gary Busey
Also the late Fred Travalena as disc jockey Mad Man Mancuso, and Stymie from The Little Rascals as a stagehand.