Designer Hedi Slimane — the man credited with creating the skinny jeans look — has left the French fashion label Yves Saint Laurent Friday after four years at the brand. One of the hottest properties in fashion, Slimane remade the brand in his own rock 'n' roll image. In what now seems a highly symbolic gesture, he kissed the late Yves Saint Laurent's partner after presenting his final show for the label last month in Paris before disappearing backstage.