"Must To Avoid" is Shelley Fabares who was in 191 episodes of the Donna Reed Show from 1958 to 1965 as Mary Stone! In 1962, Shelley had a song in the #1 position for two weeks, "Johnny Angel!"
It's almost impossible for the modern mind to comprehend, but there was a time in the not so distant past that there were only three channels on TV, and no remote control!! Gasp!!