An interview with Cheech and Chong...
How did you get George Harrison, Carole King, Billy Preston and all those people to play on Basketball Jones?
Cheech: They were in the next studio as we were recording it. Lou Adler went in there and said: "Hey! Come here. I want you to play on this tune." And they'd go, "Oh, OK!" and do it. George Harrison said: "Oh, those are very good chords. I'll have to nick those."
Chong: We ended up on Joni Mitchell's album (Court and Spark). We were all on A&M Records at the time. It was a bit of a family affair there. Whoever was in the studio at the time would just walk over to the other studio and play on the side.