During a week of endless parties at the Cannes Film Festival, amfAR’s Cinema Against Aids Gala was the crown jewel, with a mile-long guest list that included Helen Mirren, Uma Thurman, Harvey Weinstein, Elle Fanning and more models than you could imagine. Katy Perry performed–as did Sister Sledge and The Village People. Alessandra Ambrosio, Jourdan Dunn, Lily Donaldson, Natasha Poly, Doutzen Kroes and more turned the stage into a runway to model a “disco collection” of clothes from the likes of Burberry, Chanel, Prada and more–curated by Carine Roitfeld. And lest you forget that this is a fundraiser after all, the entire disco collection was auctioned off for a cool $1.7 million. Other items on the docket? The complete Taschen library housed inside a structure by Jean Prouve ($2.7 million); a one-off Ferrari previously owned by Lapo Elkann ($1.1 million); and a week at Leonardo DiCaprio‘s Palm Springs home ($500,000). DiCaprio, meanwhile, was back in action in the South of France after a quick trip to New York for the Riverkeep Gala, where he was honored for his dedication to the environment. Never mind the carbon emissions from his private jet.