LIFE: "They had fame, reams of money, and fans willing to do wild, unmentionable things just to breathe the same air — but in 1971, LIFE illustrated a different side of rock stars: Just like most of us mere mortals, they came from humble backgrounds, with moms and dads who bragged and worried about them every day."
"Everyone had told me that Frank Zappa was going to be really difficult, and he couldn't have been more professional," Olson says. As for Zappa's parents: "My father has ambitions to be an actor," Frank told LIFE. "He secretly wants to be on TV." His mom, meanwhile, thought Frank's career was fine and dandy, but envied something else about him. "The thing that makes me mad about Frank," she said, "is that his hair is curlier than mine — and blacker."
(See them all here)