Kate Middleton, Elizabeth Banks, Jennifer Lawrence, Michelle Williams, Jessica Alba

Jennifer Lawrence's gold Prabal Gurung dress wins for most memorable with its lustrous fabric and sharp cutouts, but the brazen style is not for everyone. Elizabeth Banks followed suit with another attention-grabbing number. Her canary yellow Bill Blass gown (that's right, Bill Blass) was a force to be reckoned with at the London premiere.
Of course, we can't discount the short-hemmed fashions of the week like Jessica Alba's glittering mini and Kate Middleton's pleated day dress.