Looks like best friends Katy Perry and Rihanna have hit an unfortunate rough patch.
While the world sighed and shook its head when Rihanna gave abusive ex-boyfriend Chris Brown another shot this September, sources say Katy is so frustrated with the singer's poor judgement that there's been considerable "tension" between the two ladies.
Katy's is certain that Rihanna's making a "big mistake" and "refuses" to have any part in it.
A friend told The New York Daily News that she and Rihanna are "barely talking" and Katy's been palling around with Kristen Stewart and Robert Pattinson instead, which really makes Hollywood seem like one big high school.
The two woman have been friends for years and have often gushed about each to the press.
“I’ll tell you, you do not find people like her in this industry. She’s gorgeous, charming and so unedited, it’s scary," Rihanna said of Katy to ELLE earlier this year. "That’s what intrigued me the most when I met her: she said it like she saw it.”