The title track of "Grease" not only features Peter Frampton on guitar (out of convenience, as he was in the middle of doing 'Sgt. Pepper'), but Barry Gibb himself pops in for "Got a groove, got a meaning!"
I didn't play on it either, but I guess I can still take credit for it and put it on MY solo album... .
Brian Gascoigne, brother of UK TV's University Challenge's Bamber Gascoigne, arranged 'Orpheus' and 'Let the Happiness In' on David Sylvian's Secrets of the Beehive. On the same album, Blue Mink's Ann O'Dell arranged the bonus track 'Forbidden Colours'.
Johnny Bristol's guide vocal can be heard on the Supreme's 'Someday We'll Be Together' which he co-wrote. He also co-wrote 'Love Me For A Reason', made famous by the Osmonds.
Nicky Hopkins duetted with Robert Fripp on 'Suite No.1' on The Cheerful Insanity of Giles, Giles & Fripp. That album was produced by Wayne Bickerton who six years later co-wrote 'Sugar Baby Love' for the Rubettes.
David Gilmour plays on Supertramp Brother where you bound David Gilmour plays on Paul McCartney No more lonely nights David Gilmour plays on Elton John Understanding women Steve Howe plays the "Spanish" intermezzo on Queen Innuendo
Paul and Linda McCartney sing background vocals on Night Owl by Carly Simon - from the No Secrets album.
Thomas Dolby created that lovely, ghostly intro on Foreigner's 'Waiting for a Girl Like You'. His distinctive keyboards can also be heard all over Belinda Carlisle's 'Circle In The Sand'.
Jazz great Wes Montgomery played guitar on the 50's Doo Wop classic "I'm So Young" by The Students (a Brian Wilson favourite later covered by The Beach Boys on their Today album in 1965).
Otis Spann's "The Blues Never Die" album features "Dirty Rivers" on guitar. I've always wondered who that was.
Forgot about that track! That solo is probably one of my favorites too now that you mention it, apart from Hots On For Nowhere or Achilles Last Stand lol.
Huey Lewis also played harmonica on Elvis Costello's My Aim Is True: Peter Sagal: I grew up a big Elvis Costello fan, and I always love the trivia that, you know, Huey Lewis plays the harmonica on Elvis' debut record. Huey Lewis: Right. Peter Sagal: And it didn't occur to me until quite recently that there is no harmonica on Elvis Costello's record. Huey Lewis: But the harmonica that is not on Elvis Costello's record is played by me.
Jefferson Starship's Pete Sears is on piano and bass for Rod Stewart on the Never A Dull Moment album.
Keith Moon on drums and scream (at 1:38) on "Beck's Bolero" (Jeff Beck Group): Jimmy Page, John Paul Jones, and Nicky Hopkins are also on it.