I’m 76 and never heard of them, they couldn’t have been much.
Dale, you were probably still listening to Sinatra and Dino when this act was popular in the late seventies. They were a pop music act, which is why you probably never heard them.
I liked her style of singing in her later years; less pop, more classic. Here’s “More Than You Know” (1984)
https://www.youtube.com/watch?v=2x6CJrRMxYo
This is an update on the classic L. Paul and M. Ford; “How High the Moon” (1987)
https://www.youtube.com/watch?v=4mDMVyKjMbw
Compare with the original (1951)
https://www.youtube.com/watch?v=5dxYncc0fy8