Has Katy Perry fallen out with Rihanna?

A report has claimed that Katy Perry has fallen out with her pal Rihanna.

According to the report on ShowbizSpy, Katy isn’t happy that Rihanna is hanging around with ex-boyfriend Chris Brown – yep, the same Chris Brown who violently attacked her in 2009.

“They’re barely talking and ever since the couple reunited, there has been tension between them,” a source said.

“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.”