"Will It Go Round in Circles" by Billy Preston.
It went to #1 in 1973. I'm sure someone who knows
loads about the Beatles can tell you plenty about Billy
being the only serious contender for the title of "the
fifth Beatle" and that Paul wanted him to join the
group in 1969 -- then the Beatles broke up. And that
Preston has done his share of prison time (he's there
now, IIRC.)