ponygirl2000 kindly pointed this out to me: Chuck Berry's song
Brown-eyed Handsome Man as covered by John Lennon on a tape in the late 70s. It's a good cover anyway, but, as Ponygirl says, the thing that pushes it into squee territory is that John randomly mashes it with
Get Back, of all the songs. (Thus outranking the tape where he sings
Uncle Albert/Admiral Halsey on his 31st birthday, but not the clip for Sean sings
With a little help from my friends for him, calls it his favourite song and John is glowing in nostalgia about how he and Paul sang back-up for Ringo on that one while simultanously giving interviews denying Sean ever heard a single Beatle tune.)
Speaking of rarities, YouTube has
Soily, which was the hard rock number with which Wings used to end their concerts and which was strictly a "live" song, meaning it's not on the regular records except the live "Wings over America" album from 1976. It's a screamer in the tradition of "Long Tall Sally" or "I'm Down" and very handy if someone comes up with the old "Paul only wrote silly love songs in the 70s" cliché.
One thing that I find striking (in a positive way) about the 60s generation of musicians - especially the survivors - is that yes, flawed as hell as people, but how really generous and supportive they were/are of each other, in addition to the more expected competition with each other.
( Stories and quotes from and regarding The Who, Brian Wilson, Marianne Faithfull, Bob Dylan and David Bowie )