Billy Rose to I Wonder Who's Kissing Her Now in 7 Steps
- Billy Rose wrote It's Only a Paper Moon
- It's Only a Paper Moon was arranged by Gordon Jenkins
- Gordon Jenkins arranged Makin' Whoopee
- Makin' Whoopee was written by Gus Kahn
- Gus Kahn wrote It Had to Be You
- It Had to Be You was produced by Derek Taylor
- Derek Taylor produced I Wonder Who's Kissing Her Now