We need the photographic experts to check the two photos. I think the faces are the same, but one is very made up for a professional photo and the other was just a snap - I assume.
I've looked at photos of all the other young singers and starlets I can think of. I did think of Janette Scott but it's not her. Whoever it is seemed very shy on the original photograph. The hair is late 1960s I'd say, but the dress she's wearing looks 1950s, you can just see a large net skirt.