Besides, of course, the much-anticipated new collection presented by Olivier Rousteing, the Balmain show in Paris made waves for plenty of other reasons, namely some beauty switch-ups. While Kendall went blonde, Gigi went dark; Rosie Huntington-Whiteley sported goth locks while Alessandra Ambrosio lightened up. With so many supermodels getting glam backstage, it's no wonder they took to Instagram for fun behind the scenes shots!