Lennie Niehaus to Mark Warman in 12 Steps
- Lennie Niehaus arranged Zip-A-Dee-Doo-Dah
- Zip-A-Dee-Doo-Dah features drums played by Jim Keltner
- Jim Keltner played drums for All My Life
- All My Life was arranged by John Lennon
- John Lennon produced Subterranean Homesick Blues
- Subterranean Homesick Blues features guitar played by Danny Kootch
- Danny Kootch played guitar for Pussy Cats
- Pussy Cats includes pedal steel guitar played by Sneaky Pete
- Sneaky Pete created the dinosaurs in the movie Caveman
- Caveman featured Ringo Starr
- Ringo Starr sang Runaways
- Runaways has backing vocals by Mark Warman