Katy Perry and Rihanna Friendship Reportedly on the Rocks [VIDEO]

Katy Perry and Rihanna

Did Katy Perry and Rihanna Quit Being BFFs Because of Chris Brown?

Katy Perry and Rihanna may now be former BFFs, if a report from the New York Daily News is to be believed.

The cause of their rift? Shocker: Chris Brown.

According to the Daily News, ever since Rihanna and Chris Brown have gotten back together, she and Perry are "barely talking."

Makes total sense that Perry would want to keep her friend away from dangerous relationships but, do you believe it?

Read: Chris Brown Ordered to Stay on Supervised Probation

Sources close to Perry say "there has been tension" between the friends and that RiRi didn't go to Perry's Halloween party.

Perry, says the source, feels Rihanna is "making a huge mistake and doesn't want to be part of it."

If it's true, who can blame her?

Read: Rihanna Earning Big Bucks for Flipping a Light Switch

And where did it all go wrong?

Perry and Rihanna were super chummy at the MTV Video Music Awards in September, but things have cooled since RiRi and Brown have reportedly rekindled their old romance.