Rihanna And Katy Perry Barely Talking Since Chris Brown Reunion

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Rihanna and her ex-boyfriend Chris Brown may be on the verge of getting back together but theres one person who is allegedly far from happy, and that is RiRis celebrity BFF Katy Perry.

The pair, who are known to be good gal pals are barely talking since Rihanna has publicly become close to her ex, who was convicted of beating her up in 2009.

A source has told the New York Daily News that there has been tension between them, and that Perry didnt go to the Rude Boy singers Halloween party.

Instead, Katy has been hanging out with her Hollywood pals Kristen Stewart and Robert Pattinson, despite having sat with Rihanna when she kissed Chris Brown on the lips in front of a stunned audience at the MTV Video Music Awards earlier this year.

The insider added that Katy is worried that Rihanna is making a huge mistake and doesnt want to be a part of it.

But it hasnt all be fun and games for Katy and the Twilight actors as the California Gurls singer has allegedly warned Kristen over hurting Rob again, after the 22-year-old was caught cheating this summer with her Snow White And The Huntsman director.

According to a Now source, he said: Katy didn't think Rob would ever get over the humiliation. She told K-Stew that she'll be an outcast if it happens again.

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