It was as much art fair as fashion show for designer Stella McCartney, who put on an art-infused spring collection at Paris Fashion Week on Monday that vibrated with flashes of color.

Robert De Niro was the honored guest at the 28th annual amfAR Gala Cannes, where one lucky guest won an auction to have lunch with the actor and a piece of his family history.

Artworks by Pablo Picasso, Mark Rothko, Andy Warhol and other modern masters are going up for auction as part of a billionaire couple’s acrimonious divorce.