In the 1970s, after finishing her schooling, Shelley signed on full-time at her modeling agency, Ford Models Inc., and became one of the highest-paid Supermodels of the era. She appeared in countless fashion spreads and ads for the best-selling magazines around the world such as Vogue, Harper's Bazaar, Glamour, Elle and Mademoiselle. In 1978, she appeared in an ad for Pierre Cardin. Known for his forward-thinking, futuristic approach to fashion, Cardin was a high-end fashion brand that slowly expanded into a more accessible label via a cosmetics and perfume line. In the ad, Shelley wore an up-to-the minute, soft structure, below-the-knee length dress in crêpe de Chine. The black-and-white dress had both striped and checked prints, long sleeves, and wide dropped armholes for maximum flexibility. A quirky cloche hat finished her look. And Shelley was just high-end glamorous in her designer duds.