"It's a natural looking tan," said Moss, who raved that she's been using the line for about 15 years. "When I've got a tan it definitely helps with your confidence. You just feel better"
St. Tropez is the latest in a long list of distinguished names to nab Moss as a spokeswoman. The 5'7" stunner has repped Calvin Klein, Givenchy, Kerastase, Gucci, Dolce & Gabbana, and Chanel, to name a few.
Click the video above for a behind-the-scenes look at her sexy campaign shoot!