If this is the photocall, just what will she wear on the carpet?Cara Delevingne attends the 78th Cannes Film Festival on May 22, 2025.Credit: Getty ImagesThe GistCara Delevingne debuted a dramatic, rock star-coded hair change, and she looks so different.She complemented her beauty transformation by going braless under her sheer top and pinstripe suit.The actress-model attended the 79th Cannes Film Festival.From the 2026 Met Gala steps to the 79t…