Pieter Mulier at Alaïa then provided some more layers to her look, designing a puffer scarf and blanket coat—both with built-in gloves—which Rihanna wore throughout her performance.

The 30-year-old stunned in an elegant custom Louis Vuitton mint green gown which featured a matching cape that the star draped around her shoulders. Saoirse kept the look simple with a pair of classic ...