Last Night's Look: Love It or Leave It?We can't stop talking about Kim Kardashian's abs-baring dress, Duchess Catherine's Jenny Packham gown and more outfits that stars were just spotted in. Check them out, then vote – fashion-forward or fashion fail?

NATALIE PORTMAN

Her red carpet appearances may be sporadic these days, but the actress makes every one count. For the London premiere of Thor: The Dark World she wows in a black cashmere long-sleeve top and silver metallic ball skirt both by Dior.