Kristen Stewart denim LAX

She reaaaally wanted to return to Los Angeles! Wonder if it had something to do with those persistent rumors that she's still trying to win back ex-boyfriend Robert Pattinson?

Kristen Stewart looked rather glum on Saturday evening when she landed at LAX after a quick trip to the Sundance Film Festival, where she premiered Camp X-Ray, in which she plays a young guard at Guantanamo Bay.

"I was so nervous when I first started working and preparing because I didn't think that people would believe me or think that I looked tough in a uniform," K. Stew told MTV of tackling the role.

While she wouldn't chat about her love life, she did dish on her adorable new dog. "I have a pup, yeah. I actually got on her on Camp X-Ray and named her my character name, which is so embarrassing. But it's so cute. Young Cole," she said. So what about her newish tattoos? While she did confirm that the tattoos are real, she wouldn't explain why she got them. You KNOW at least one of those has to do with Rob...