Lupita Nyong'o in Giambattista Valli Couture at the Marie Claire Celebrates May Cover Stars event

This year's Best Actress Oscar winner Lupita Nyong'o features on the May 2014 cover of Marie Claire, and attended the Marie Claire Celebrates May Cover Stars party with fellow cover stars. The actress wore a stunning Giambattista Valli Fall 2013 Couture dress featuring blue floral embroidery and a fit and flare silhouette. Lupita added spice to her look with a bold magenta lip colour, Christian Louboutin pumps and Graziela Gems floral jewellery.