Katy Perry goes in this interview in my opinion quite in detail. If she really sent this sms to Kristen so we do not know and will probably never know. One can be seen from the lines of the interview yet but probably include: Rob and Kristen are not a couple (more) - we stand behind them and look forward to the movies that they will shoot in the future ... Nevertheless, today is not a good day to "annoy" to us ...
Like her pyrotechnic stage outfits, her humour is saucy and postcard style - all double entendres and faintly inappropriate fart jokes. 'OK, so here's the proof there was never anything going on with me and Robert Pattinson. I fart in front of him. Properly fart. And I never, ever fart in front of a man I am dating. That's a rule.' It's typical Katy - a disarming way to difuse an awkward topic. 'He's my bud. I'm like his big sister. We just hang out. The other day, I said: "One of the things I'm most proud of is not sleeping with you, Robert." And that's true.'
Part of my thinks quiet, English Robert might be a lovely boyfriend for Katy. Yet, it's clear, given her predilection for bad, big-mouthed boys, that he is absolutely not her type.
She also has A-list girlfriend, with whom relations sometimes seem a little strained. Mortified at being painted as the other woman, she made sure Kristen Stewart knew the Robert Pattinson relationship rumors were just that. '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. I'm just trying to be a friend to him but it is unfortunate that I do have a set of tits."'
via Ms. Stewart & Mr. Pattinson