Viva's Looks of the Week

Who's wearing what this week, from London to L.A.

A vision in red, actress Gemma Arterton wore a skirt and crop top by Prabal Gurung at the Serpentine Gallery party. Picture / AP Images

Image 1 of 5: A vision in red, actress Gemma Arterton wore a skirt and crop top by Prabal Gurung at the Serpentine Gallery party. Picture / AP Images