 Spanning the globe, this is AT40's Rock and Roll Triathlon, the 40 biggest artists who have hit in the 60s, 70s, and 80s. Well now, here's a man who makes our countdown because he was a fifth Beatle. That's right, and you thought they were only the Fab Four. In 1969, the Beatles single Get Back had label credits that read, The Beatles with Billy Preston.