Olivia Newton John to Mary Hopkin in 12 Steps
- Olivia Newton John is in the cast of Grease
- Grease cast includes John Travolta
- John Travolta is one of many artists that recorded It Had to Be You
- It Had to Be You was produced by Derek Taylor
- Derek Taylor produced Over The Rainbow
- Over The Rainbow was written by Edgar Yipsel Harburg
- Edgar Yipsel Harburg was born on April 8
- April 8 is the birthday of Julian Lennon
- Julian Lennon appeared in a 1994 Public Service Announcement for Recording Artists, Actors, and Athletes Against Drunk Driving
- Recording Artists, Actors, and Athletes Against Drunk Driving created a PSA featuring Paul McCartney
- Paul McCartney produced Mary Hopkin's recording of The Puppy Song
- The Puppy Song was covered by Mary Hopkin