One-off duets from the 60s and 70s

TV show; not a record - Bing Crosby and the Temptations' Paul Williams

 

Obviously not the only collab they did but the best one.

Serge Gainsbourg et Jane Birkin. Je t'aime... moi non plus

 

Emmy Lou Harris & Don Everly - Every Time You Leave

 

I’m not sure what is meant by “One-off,” but Frank and Nancy followed that up with two more (neither of which achieved the same success), a couple years later:

Life's A Trippy Thing (Nancy & Frank Sinatra)
Feelin' Kinda Sunday (Nancy & Frank Sinatra)

 

Phil Everly and Sandra Locke - Don't Say You Don't Love Me No More

 

How about Harry Nilsson...and Cher?

 

Post 24

 

John Mayall's Bluesbreakers and Paul Butterfield.

 

I think it's fair to call the Peter Sellers/Sophia Loren thing a one-off combination, though there were actually a couple of songs that came out of it - this was the best one:



Well Goodness Gracious Me!

"I remember that with one jab
of my needle in the Punjab"

 

Move over, Roberta Flack and Donny Hathaway. Sorry, John Travolta and Olivia Newton-John. There's no competing with Young Americans, Song Sung Blue, One, Da Doo Ron Ron, Wedding Bell Blues, Maybe Baby, Day Tripper, Blue Moon, Only You (And You Alone), Temptation, Ain’t No Sunshine, and Young Blood, by David Bowie and Cher.