In 2005, Mendes was employed by Revlon as an international spokesperson, and participated in their campaign to raise funds for breast cancer research. In December 2007, People for the Ethical Treatment of Animals (PETA) used a nude photo of Mendes for their anti-fur campaign. Mendes was a spokesmodel for the 2008 Campari calendar, and in July 2008, she was announced as the international face of Australia's 30 Days of Fashion & Beauty event. She made guest appearances in that country at the month-long festival in September. She also appeared nude in a 2008 print advertisement for Calvin Klein's Secret Obsession perfume, an ad which was banned in the United States.