kate-noami-amfar.jpgGetty for amfAR

It's like a 90s supermodel reunion! Except Kate kinda stole the show by going bra-less in a bright red Saint Laurent dress...

On Friday evening Kate Moss and Naomi Campbell attended the amFar Inspiration Gala in Sao Paulo, Brazil, and the ladies were also joined by Sharon Stone, Riccardo Tisci, Candice Swanepoel and Mary J. Blige for the annual event. Stone tweeted, "Excited to head back to Brazil for #amfARSaoPaulo and raise HIV/AIDS awareness. It’s time we find a cure. More than 600,000 people in Brazil have #HIV. Let’s reduce the impact of #AIDS. Support @amfAR research. #amfARSaoPaulo."

The Inspiration galas have been held in New York, Los Angeles, Paris and Rio de Janeiro over the last few years, with the events raising more than $10 million for AIDS research.