They once had pop's best womance, but after an alleged fall out, Rihanna and Katy Perry are showing no signs of making up as they reportedly demanded to be sat apart at Sunday night's Grammys.

rihanna katy perry

Rihanna and Katy Perry at 2012's Grammy Awards

The pair were said to have fallen out last October over Rihanna's decision to reunite with her abusive ex, Chris Brown and are reportedly still not on speaking terms.

Their refusal to sit near each other at the Grammys apparently angered event organisers, with a source telling US Weekly: “Such a headache! They aren’t tight anymore because Katy doesn’t approve of Rihanna dating Chris Brown.”

rihanna chris brown

Rihanna and Chris put on a front row PDA at Sunday's Grammys

However, HollywoodLife.com reports friends close to Rihanna are insisting she has no problem with Katy, but does not care what she thinks about her relationship.

"Rihanna doesn't have a problem with anyone and couldn't give a f**k about what anybody thinks about her relationship. She was focused on her and Chris and enjoying her night," a source said.

katy perry john mayer

Katy sat away from Rihanna at Sunday's Grammys with boyfriend John Mayer

Rihanna and Katy were last seen together at the MTV Video Music Awards in September, which was also the night RiRi was caught sharing a kiss with Chris.

But the 'California Gurls' singer warned her pal she was 'making a huge mistake' by getting back with Chris.

A source told New York Daily News at the time: “They’re barely talking and ever since the couple reunited, there has been tension between them. Katy has been spending a lot of time with pals Robert Pattinson and Kristen Stewart.

“Katy fears Rihanna is making a huge mistake and doesn’t want to be part of it.”

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