American painter and photographer Richard Prince is quite a controversial figure in the contemporary art world. His most famous work Untitled (Cowboy) was a re-photograph of old cigarette adverts. It sold for over $1 million at Christie's in New York, despite being in breach of a whole host of copyright laws.
Prince is also notorious for 1983's Spiritual America, which featured somebody else's photo of a ten-year old Brooke Shields in the bath. He was subsequently sued by both the original photographer and Shields' mother.
Prince has done loads of other stuff too, like trash-novel photo-paintings, putting old cars in galleries and collaborating with Mark Jacobs for the Louis Vuitton Spring '08 collection. Proof, if ever it were needed, that a high profile lawsuit or two can do wonders for one's career.