Help us identify Las Vegas Strip mystery singer

My pal Dennis McBride needs your help.  He has a photo, presumably taken in the late 1960s, that includes a mystery singer who used to perform on the Las Vegas Strip.  Can you help us identify our mystery singer?



From left to right:  unidentified woman, crooner Tony Martin, funny lady Nancy Austin, Mrs. Austin's manager/husband David London, and our mystery singer.

Let us know if you can help!  Post your results!