a promo pic of Shelley from 1978
Shelley reached Supermodel status in 1976 when she began endorsing Charlie perfume. It was an era when exclusive modeling contracts were unheard of and giant cosmetics companies were beginning to give them out. Shelley signed on to become Revlon's Charlie Girl and the brand became an international sensation, a phenomenon worldwide - catapulting Charlie and Shelley Hack to iconic status. This brought Shelley to the attention of Spelling-Goldberg in 1979. They were looking for a girl to fill in Kate Jackson's empty slot in their hit series Charlie's Angels; and Shelley fit the part to a T. She was THE Charlie Girl, and now she was going to be their newest Charlie's Angel.
a writeup about Shelley from 1979