John Lennon to Head in 12 Steps
- John Lennon was a member of the Beatles
- The Beatles recorded She's Leaving Home
- She's Leaving Home was arranged by George Tipton
- George Tipton arranged Miss Butter's Lament
- Miss Butter's Lament was published by Six Continents Music
- Six Continents Music published Gentlemen Friend
- Gentlemen Friend was written by Harry Nilsson
- Harry Nilsson wrote I Yam What I Yam
- I Yam What I Yam was arranged by Van Dyke Parks
- Van Dyke Parks appears in The Two Jakes
- The Two Jakes stars Jack Nicholson
- Jack Nicholson wrote Head