Katy Perry's single Roar has become a smash hit, racking up over a half-million downloads in the first week, but there's one person that might not be a fan -- her ex. PICS: Surprising Celebrity Hookups The former flame, who has remained unnamed, is seen ...

I don’t think I’ve ever seen anything quite like a Katy Perry concert before - and I mean that in the best possible way.

LOS ANGELES — Katy Perry took the witness stand Thursday and assured a federal ... Max Martin and Cirkut began to fashion the tune that later appeared on her fourth studio album, “Prism,” which she performed in a truncated version at the 2015 Super ...