Kristen Stewart  made her way through the security line at LAX this afternoon. She was wearing her usual sneakers and jeans, but she 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.