Katy Perry is letting her ex hear her "roar." The pop star, 40, couldn't hold back her frustration after a fan proposed she ...

Katy Perry had the funniest reaction possible to a fan requesting that she sing her John Mayer duet mid-concert—watch here.

Get a sneak peek at the 305 ladies spilling the hot gossip on the RHOM After Show, which kicks off on August 13.

The RHOM After Show dives into Alexia Nepola's Watch What Happens Live moment with John Mayer. Was there chemistry? Plus, the ...