It's not really a surprise for Coco Rocha to walk a Zac Posen runway, but as usual, when she kicked off the Spring 2014 collection in an immaculate hand-plissé silk chiffon dress, a collective gasp took hold of those gathered. Perhaps, this time, it had less to do with her celebrity and more to do with the fact that she seemed to have stepped out of an Impressionist painting. With pale florals and ethereal fabrics, Posen -- who, according to show notes, sought to evoke a modern-day Sarah Bernhardt --provided the requisite romanticism we've come to expect. (The shoes, all Manolo Blahnik, didn't hurt his cause.) For his famous fans -- like Christina Hendricks and Molly Sims, both of whom took front row -- he provided red-carpet-worthy drama in the form of an expertly draped gray jacquard evening gown and a corseted frock engulfed in the prettiest of peach ruffles.