Is this the end of one of the best showbiz friendships in existence?!

image: Getty

Yes, they're showbiz BFF's. But that doesn't mean either one should be gettin' buddy buddy with the others Ex.

Rihanna is planning to record a duet with John Mayer. OVER THE LINE RIRI! Katy is reportedly still very upset after her split with John, and wants to ditch her friendship with Rihanna over this incident.


"Katy's been left shocked and hurt after finding out John and Rihanna met up at an LA recording studio two weeks ago before having dinner," said a source close to Katy. 

"Rihanna asked John to sing vocals on a new track," the insider added. "But Katy's flipped out and told her best friend she's gone one step too far this time."