Are you talking about *the* 50's...or *her* 50's? Her first album was released in '61 and she looked damn good on the cover so it's likely that she looked good in the 1950's as well.
She’s real young looking in that photo. Maybe the ‘50s is a stretch, but early ‘60s isn’t. I bought her 45 ‘Both Sides Now’ (the Joni Mitchell composition) when it came out. Always liked Judy Collins.
FRegards,
LH
By the way, Judy is about to turn 71. It’s hard to believe, but she’s about 6 months older than Grace Slick.