Guess? is a brand of clothing lines worldwide. Used as the question mark symbol ? . It is known for its sexual content advertising, which include television commercials and billboards, the well-known. These are characterized by black and white photos, which were popular models from the likes of Claudia Schiffer , Valeria Mazza , Drew Barrymore , Anna Nicole Smith and Paris Hilton . Guess also produces clothing accessories such as watches and jewelry . More