Jan Smithers was a singer in a group called Hot Cup of Friends in 1973. She was the girlfriend of the band leader, who was Henry Mancini’s son
This was posted on fb, including a link to a Midnight Special in which this group appears (at about 37:00 if this link doesn't go the correct spot).
https://www.youtube.com/watch?v=rR_XNR6QwMg
― nickn, Saturday, 16 December 2023 04:01 (four months ago) link
OK, may have to rewind a bit.