John Lennon to Paul McCartney in 9 Steps

1. John Lennon arranged Mucho Mungo-Mt. Elga
2. Mucho Mungo-Mt. Elga features guitar played by Jesse Ed Davis
3. Jesse Ed Davis played guitar for Lady Gaye
4. Lady Gaye was written by Vini Poncia
5. Vini Poncia played guitar for You're Sixteen
6. You're Sixteen features drums played by Jim Keltner
7. Jim Keltner played drums for Ringo Starr
8. Ringo Starr appeared in a 1994 Public Service Announcement for Recording Artists, Actors, and Athletes Against Drunk Driving
9. Recording Artists, Actors, and Athletes Against Drunk Driving created a PSA featuring Paul McCartney

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