Yes, ‘Superstar’ (written by Leon Russell) was my favorite too, but they had so many hits. “Close to you” will always make me smile.
(Russell gives credit to Delaney and Bonnie, who had the first version of the song, but according to Wiki, Rita Coolidge gets credit for the idea - a song about groupies)
A beautiful voice, a lovely lady and such a sad ending.
We’ve Only Just Begun was written by Paul Williams. I think it was used in a TV commercial for a bank.