Rihanna sure knows how to sell a product. The Bajan siren strips down to her underwear in the latest ads for Armani Jeans, exposing her smokin’ body while posing in the back seat of a vintage car. The temptress, who’s planning to release new music this fall, models a short blonde wig in the black-and-white images shot by famed photographer Steven Klein, which will appear in national magazines. Satisfy your appetite with more hot pics below.