On this week's As Seen on the Street: Kate Middleton dons her most festive holiday attire yet. Plus, Rita Ora's take on avant-garde, and Emily Blunt brings back a 90s trend. Celebrities (and royals!) seem to be opting for a more modern approach to their wardrobe choices, and they're proving this winter won't be all dark colors, all the time... right, Hailee Steinfeld? Check out the coolest looks we've seen this holiday season and get ready to step-up your street style game!