The Best Fashion Instagrams of the Week: Kate Hudson Makes a Case for Holiday Athleisure

Sure, we've been in defense of dressing up for party season--proselytizing on the benefits of leaving one's drawstring waist-cinching outfits at the gym rather than trotting them out for Christmas dinner--but this week Kate Hudson posted a selfie that calls our holiday-dressing theory into question. Popping up on our Instagram feed, the actress appeared more than cozy in her Denver Broncos pajama set with her son, Ryder Robinson. Posing against the decorated fireplace, she made us realize that t...