Al Casey to Mary Hopkin in 8 Steps
- Al Casey played guitar for Aerial Ballet
- Aerial Ballet includes timpani played by Milt Holland
- Milt Holland played percussion for Duit on Mon Dei
- Duit on Mon Dei includes drums played by Ringo Starr
- Ringo Starr 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 by Mary Hopkin features guitar played by Mary Hopkin