Mac Rebennack to Show Business in 8 Steps
- Mac Rebennack played piano for Flash Harry
- Flash Harry includes bass played by Klaus Voormann
- Klaus Voormann played bass for Turn On Your Radio
- Turn On Your Radio was produced by Richard Perry
- Richard Perry produced My World
- My World is an album by Ray Charles
- Ray Charles is one of many artists that recorded It Had to Be You
- It Had to Be You appeared in the film Show Business