Only now does it occur to me... that John Ratzenberger (a.k.a. "Cliff Clavin" from CHEERS) was once in a quasi-folk-punk band called "Ivan and the Terribles."
(Alas, this wasn't in real life, but instead only in a very, very brief sequence in MOTEL HELL, a fairly creative hillbilly horror flick that fuses together tropes from PSYCHO, TEXAS CHAINSAW MASSACRE, and, oddly enough, DAWN OF THE DEAD.)