BASIC BLACK: Designer Osman Yousefzada had some precious surprises up his sleeve at a mini retrospective of his frocks at Didier Ludot’s Palais Royal store. The London-based designer unveiled a range of jewelry including Art Deco-inspired necklaces and bracelets made from gold “snake chains,” crystal and precious stones. Meanwhile, Ludot said he’s already persuaded a number of personalities to participate in his September exhibition of vintage little black dresses to mark the tenth anniversary of Ludot’s other boutique, La Petite Robe Noir. “Several people, including Catherine Deneuve, Ines de la Fressange and Azzedine Alaïa, have agreed to write about what the little black dress means to them,” said Ludot, who noted Deneuve is also a vintage bag fiend. “She has a vast collection of bags, particularly from the Thirties and Forties, as well as some great YSL models from the Seventies and Eighties that were made especially for her,” he said.