Billy Preston was a musical genius. A child prodigy, he was first seen as a small boy performing live on national TV with Nat King Cole. He was a star of the Hammond Organ, an accomplished dancer and a talented singer-songwriter. He is the only person 'officially' recognised as the fifth Beatle, although that title would turn out to be more of a millstone than a milestone. By the 1970s he'd written three number one singles, toured and recorded with the Rolling Stones and collaborated with some of the biggest names in pop: Bob Dylan, Ray Charles, Little Richard, Eric Clapton, Sly Stone, the Jackson 5 and Aretha Franklin to name just a few. His musical career was out of this world but his personal life was a disaster. He spent much of his life battling with drugs and even ended up in jail.