Katy Perry's glamorous gown for Sunday's live taping of American Idol sparked a myriad of reactions, with even the host Ryan Seacrest joking that she had the dates for the Met Gala mixed up.

Some celebrities prefer to stay quiet about their political beliefs, but Katy Perry is not ... when she performed at the Grammys on Sunday, she didn’t hold back. Perry wore a band reading ...

Katy Perry 's revealing sea foam green dress, and Taylor Swift's opening Grammy performance were all among the most talked about moments from the 55th annual Grammy Awards. If you're wondering ...