Katy Perry: 'I Fart In Front Of Robert Pattinson'

Katy Perry has opened up about her relationship with actorRobert Pattinson - insisting that she's not romantically involved with the Twilight star.

And K-Pez reckons the fact that she lets rip in front of her showbiz pal proves that they are just good friends.

Speaking to Kristen Stewart to tackle the subject.

"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 t**s'."

Katy has released a teaser clip for her next single.