Is it just me, or are tv and movie starlets of the 50s and 60s just...well, much more beautiful than most of today? A groovy 60s Supergirl would have been...just wonderful, no?
'Yes' is the answer.
Anyway, I have three choices (ooh, and these links most likely aren't work-safe):
1) Chirpy, bubbly, adorably cute Supergirl with big big hair: