Katy Perry, who just announced the U.S. leg of her upcoming Lifetimes Tour, exclusively told E! News how she and fiancé ...

After Madaí ChaKell performed the 2008 hit, Perry asked her to sing "Happy Birthday." Katy Perry was a little hot and cold when it came to an American Idol hopeful using one of her signature ...

Once upon a celebrity moment, Katy Perry gave the term “shooting for the stars” a whole new meaning! For then-husband Russell Brand’s birthday, she dropped a cool £125K ($156K) on a ticket ...

singing the song with Katy Perry. Take a look at the video below: “Happy birthday Radhika,” wrote Orry while sharing the video, adding a heart emoji at the end. This is Radhika Merchant's ...