Casta was the official face of L'Oréal, Dior, and Chanel. She was featured in Guess? Jeans, Tommy Hilfiger, Miu Miu and XOXO ad campaigns. Casta has appeared on over 100 magazine covers including Victoria's Secret catalogs, ELLE magazine, and Vogue magazine, and has been credited, along with Tyra Banks, with bringing back voluptuous models. She also appeared in three consecutive Sports Illustrated Swimsuit Issue, Rolling Stone, and a Pirelli Calendar.She once had a close relationship with designer Yves St. Laurent, whose outfits she would regularly wear at public appearances.Casta was also prominently featured in the music video for the Chris Isaak song "Baby Did a Bad, Bad Thing" in 1999. In the video, Casta was seen in a motel room and sexy lingerie while being watched by Isaak in the next room. Casta was semi-nude through most of the video. There were two versions of the video. VH1 aired the censored version before 9 p.m. and the uncensored version was aired after 9 p.m. witching hour. This video was ranked #28 on VH1's 50 Sexiest Video Moments. The video was regarded as too steamy by the network. She is also the subject of a song written by popular alternative rock band, Brand New, in their song "Magazines".