SNAP HAPPY: Jessica Chastain, clad in a figure-hugging sleeveless black double-breasted trouser suit with contrasting bright red lips, provoked a camera crush at the Viktor & Rolf show Saturday. The actress, who fronts Yves Saint Laurent’s Manifesto fragrance, which is rolling out globally this month, was overheard saying she is taking a vacation following last weekend’s Oscars. There’s little chance of Chastain’s going incognito in Paris, however. Her face is splashed across a giant billboard for the scent on a building undergoing renovation that overlooks the Seine. Renzo Rosso and Ulyana Sergeenko joined the actress in Viktor & Rolf’s front row.