The pop icon recalls having laryngitis while recording the soundtrack for 1969’s Butch Cassidy & The Sundance Kid soundtrack, which would yield the Oscar-winning, Hal David and Burt Bacharach-penned megahit Raindrops Keep Fallin’ on My Head. “I had been to the doctor a couple of days before we did the session and I could barely talk, B.J. tells Milling About host Robin Milling. “The doctor didn't want me to even speak for two weeks, let alone sing. He gave me a B12 shot and I got through the song after five times. Burt was quite upset that I wasn't in good shape but the 20th Century Fox guy said, 'Boy this is great. It sounds like maybe Paul Newman was singing! That's a great idea!'”