Elton John with Kiki Dee – “Don’t Go Breakin’ My Heart” – (1976)

Here’s one of the most famous duets of all time. It was a #1 hit on the Hot 100 for the better part of a month and it was intended as sort of Marvin Gaye-esque duet and if you listen to it that way, you certainly can hear it. This song was never included on an actual album, but only released as a single (it appeared on other albums years later, however). It remains one of Elton’s biggest hits and the main thing Kiki Dee is known for.