Kristen Stewart made her way through the security line at LAX yesterday. She was wearing her usual sneakers and jeans, but spiced up the look with sunglasses and a denim shirt. Kristen spent the weekend with boyfriend Robert Pattinson in LA, where she celebrated the Oscars at the WME agency party and also dined out at Il Covo with a group of pals. Kristen kicked off the fun few days on Thursday when she went to Balenciaga with her publicist, though we have yet to see her step out in the dress she picked up during the shopping trip. This morning, Kristen arrived in Paris. She's in France just as Paris Fashion Week begins there. Kristen, the new face of Balenciaga perfume, may decide to make a cameo at the brand's Fall 2012 show tomorrow.