A little while back we got to see Kristen Stewart‘s new Balenciaga ad, as the actress officially became the face of Balenciaga‘s perfume Florabotanica earlier this year. The fashion house, founded by Basque designer Cristóbal Balenciaga, just had its Spring/Summer 2013 ready-to-wear showing at Paris Fashion Week and Kristen Stewart was in the building. The actress (who may or may not be back with Robert Pattinson) was all smiles (with the occasional grimace, lol), rocking a yellow Balenciaga leather jacket, some funky leather ankle boots and floral jeans. Between her look and that insane Karlie Kloss photo shoot, I’m thinking leather is officially in. Photogs also caught the eternally gorgeous Salma Hayek and her husband, French billionaire Francois-Henri Pinault heading into the event. Pinault is CEO of PPR, a major fashion company which owns Balenciaga (they also own or part-own Gucci, Yves Saint Laurent, Boucheron, Alexander McQueen, Stella McCartney, Bottega Veneta, and others… in case you were curious about how one becomes a French billionaire). Peep the gallery for more!