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"Katy Perry has explained her relationship with Robert Pattinson, saying she &amp;quot;properly farts&amp;quot; in front of the Twilight actor. The singer was rumoured to be dating Pattinson following his split from Kristen Stewart last year.   Perry told Elle: &amp;quot;I fart in front of him. Properly fart. And I never, ever fart in front of a man I am dating. That&amp;#039;s a rule. &amp;quot;He&amp;#039;s my bud, I&amp;#039;m like his big sister. We just hang out. The other day, I said, &amp;#039;One of the things I&amp;#039;m most proud of is not sleeping with you, Robert&amp;#039;. And that&amp;#039;s true.&amp;quot; The star also revealed that she had been in touch with Kristen Stewart about the speculation, adding: &amp;quot;I sent her a text message saying, &amp;#039;I know you&amp;#039;ve seen all this stuff but you know I would never disrespect you. I&amp;#039;m not that person.  &amp;quot;I&amp;#039;m just trying to be a friend to him but it is unfortunate that I do have a set of tits&amp;#039;.&amp;quot; Perry recently announced that her next album will be titled Prism, and has revealed a secret collaboration with Britney Spears. Watch a new teaser for her forthcoming single &amp;#039;Roar&amp;#039; below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/showbiz/news/a503745/katy-perry-on-robert-pattinson-relationship-i-fart-in-front-of-him/>