Each of these records features someone else famous "guest starring" - singing backup, playing guitar, playing other instruments - before these were generally credited on the label. I've given you the name of the record, and the job that the "guest star" does - you tell me who it was.

1. "While My Guitar Gently Weeps," Beatles (guitar)
2. "Good Feeling," Flo Rida (backup vocals)
3. "Let's Dance," David Bowie (guitar)
4. "Diamonds," Herb Alpert (vocals)
5. "Chain Reaction," Diana Ross (backup vocals)
6. "The End of the Innocence," Don Henley (piano)
7. "Whatever Gets You Through The Night," John Lennon (backup vocals)
8. "Money for Nothing," Dire Straits (backup vocal)
9. "My Life," Billy Joel (backup vocal)
10. "Urgent," Foreigner (saxophone)
11. "Sidewalk Talk," Jellybean (chorus vocal)
12. "Layla," Derek and the Dominos (guitar)
13. "Gold," John Stewart (backup vocal)
14. "Stand Back," Stevie Nicks (keyboards)
15. "I Know There's Something Going On," Frida (drums)
16. "I Won't Back Down," Tom Petty (guitar)
17. "There Must Be An Angel," Eurythmics (harmonica)

Bonus: "Fly Away," John Denver (backup vocals)