Freddie Mercury and Ringo Starr https://queenpoland.files.wordpress...-ringo-starr-in-1975-photo-by-dan-mcgrath.jpg
Possibly/probably mentioned somewhere on this 127 page thread....John Lydon and Keith Emerson. They were friends, but it still makes "unexpected" viewing when considering music history.
Now this is an interesting picture for anyone who knows Paul's history. It fits this thread at first because of Linda Ronstadt, but Peter Asher, her producer, was also Paul's old flame Jane Asher's brother (preceding Linda Eastman).