Katy Perry 'avoiding Rihanna because she doesn't approve of Chris Brown'

Katy Perry is avoiding Rihanna following her reconciliation with Chris Brown, it has been claimed. It has emerged that the former best pals fell out because of the Stay singer's October reconciliation with Chris Brown, who is still on probation for beating her in 2009.

 And it seems the fall out is permanent - with Katy reportedly making a special request to be seated nowhere near the couple at the Grammy Awards in Los Angeles on Sunday night. 

A source told USMagazine 'They aren't tight anymore because Katy doesn't approve of Rihanna dating Chris Brown.' Friends close to Rihanna, 24, insist she has no problem with Katy, 28, but doesn't care what anyone thinks about her relationship because she is happy. 

An insider told HollywoodLife.com: 'Rihanna doesn't have a problem with anyone and could give a f*** about what anybody thinks about her relationship. She was focused on her and Chris and enjoying her night.'