At last year's Grammy Awards BFFs Katy Perry and Rihanna sat together and even held hands during the ceremony, fast forward 12 months and the pair reportedly didn't mix at the music industry's biggest night, despite both attending a slew of events.
The cooling of their friendship is said to be over the 'Diamonds' singer's decision to get back with former flame Chris Brown, which Perry allegedly thinks is a mistake. Both girls sat with their boyfriends, but were separated in the auditorium, a stark contrast to last year's super friendly evening.
Katy Perry with boyfriend John Mayer at the Grammy Awards 2013 (WENN)According to Grazia magazine Katy, who sat with boyfriend John Mayer, has distanced herself from the Bajan beauty as she disapproves of her getting back with Brown.
"Katy was always the one person who could really stand up to Rihanna," a source told the mag. "When it comes to Chris, Rihanna isn't willing to listen. Katy is still incredibly angry about what Chris did, and she doesn't believe he can change."By Rebecca Merriman