1973 saw the introduction of the Charlie fragrance, tailor-made by Revlon for the modern, working woman. In 1976, after a string of other models, Shelley signed a ground-breaking exclusive modeling contract with Revlon. She was hand-picked to represent the Revlon Charlie brand, as she was the embodiment the brand's ideal – gorgeous, sexy and young. Renowned hair stylist and makeup artist Rick Gillette recalls, "Shelley Hack was really the perfect girl for Charlie. I remember when Revlon creative director David Leddick had Steen Svensson shoot the first presentation with her that got her the contract." And Shelley became a sort of poster girl for the modern, gorgeous, sexy, young woman in charge of her own life; and everyone wanted to be a Charlie Girl.
Shelley, THE quintessential Charlie Girl, appeared in many, many ads for the brand. In 1978, she appeared in a newspaper ad for Charlie called "Charlie's Body Language." It was for a promo for Charlie Body Silk, Charlie's body lotion that had that familiar Charlie fragrance as it softened dry skin all over the body. The 8-ounce container came with its own convenient pump and was both handy and ready-to-use. Valued at $8.00, it was available for just $3.00 for any $5.00 or more purchase from the Charlie or Chaz collection. And, of course, an artwork of Shelley appeared in the ad, Charlie Girl gorgeous as always.