Mary's part of this Classic 60's TV Show Dance Party video
Check it out. She looks great (along with several other hotties from the 60s.)
https://www.youtube.com/watch?v=lPj3SJcx0Wc
By the way, the babe with the nice @ss who appears first in the video is Diana Rigg, who is probably better know to the younger crowd as this character:
https://www.wired.com/images_blogs/underwire/2013/01/Diana-Rigg-as-Olenna-Tyrell_crop.jpg