Guy tells Rolling Stone: "Muddy Waters and Willie Dixon walked straight in my studio while I was singing, with a bunch of white guys who lined up against the wall while I was singing.

"I got pissed off: 'Who in the hell are these guys?' I had never seen a white man with hair that long and high-heeled boots before." But he adds: "When they came to America, they recognized some of the greatest musicians I'd admired - Ike and Tina Turner, Muddy Waters, Howlin' Wolf - and let America know who we were. They let white America know what the blues is. We owe those guys all the thanks in the world."