Shelley played Tiffany Welles,
Angel no. 5, on Charlie's Angels
Shelley joined the cast of Charlie's Angels in 1979 and became an instant superstar. She was already a Supermodel at the time and was one of the highest-paid models in the world. Charlie's Angels became her big break into show business. She played Tiffany Welles and was dubbed as Charlie's classiest Angel. She should have been dubbed as Charlie's most intelligent Angel as well because not only was she gorgeous, she was (and is one) of the brightest women to ever enter show business.
a 1980s writeup about Charlies Angels from Pop Rocky magazine