Katy Perry for Elle UK: Is She the Reason why RobSten Split?
Katy made sure to clear things up with Rob's ex, Kristen Stewart. "I sent her a text message saying, ‘I know you've seen all this stuff, but you know I would never disrespect you. I'm not that person,'" Katy recalls. "'I'm just trying to be a friend to him but it is unfortunate that I do have a set of tits."'