When all of Hollywood and fashion come together in the South of France, pure glamour is sure to ensue. Last night, the Hotel du Cap-Eden-Roc played host to the 23rd annual Cinema Against AIDS gala during Cannes. All of the usual suspects were there, like supermodels Heidi Klum, Karlie Kloss, Alessandra Ambrosio, and Jourdan Dunn, as well as fresh faces including Bella Hadid and Elle Fanning. Of course, where there's models, there's Leonardo DiCaprio, who, if it weren't for her beau Orlando Bloom, might have been Katy Perry's main interest of the night - you know, besides taking to the stage for a golden performance. Between that and an exciting live auction, the evening's well-heeled attendees took to the runway for a disco fashion show, raising more than $1 million through that alone. Who says fashion is frivolous?

[Katy Perry, Georgina Chapman via Getty]