A viral video of Katy Perry sparked rumors of a heated altercation related to her controversial collaboration with Dr. Luke.

Katy Perry and John Mayer were seated near each other for Sabrina Carpenter's L.A. concert on Nov. 18. Now, Perry's reaction ...

Pop star Katy Perry successfully overturned a trademark decision barring her from using her own name to sell merchandise in ...

1 of 5 | Katy Perry attends the Baby2Baby annual gala at the Pacific Design Center on November 9. She announced the U.K. leg ...

ITV MUSIC SPECIAL WILL AIR ON ITV1 AND ITVX LATER THIS YEAR, FEATURING GLOBAL SUPERSTAR KATY PERRY WITH CELEBRITY GUESTS, AS ...