Blackbird to Ella Fitzgerald in 6 Steps
- Blackbird was produced by Harry Nilsson
- Harry Nilsson sang It Had to Be You
- It Had to Be You appeared in the film Show Business
- Show Business is a 1944 film starring Eddie Cantor
- Eddie Cantor was the first singer to record Makin' Whoopee!
- Makin' Whoopee! was recorded by many artists including Ella Fitzgerald