katy perry

From Gwen Stefani to Miley Cyrus and John Mayer, these pop stars have written breakup songs about other famous people.

Gaga? Katy? Britney? Miley?

And the episode came with some requisite reality TV drama.

'Our hearts are in the right place,' the country star says.

'A Moment Like This' no longer.

Beyonce and Adele are both likely performing at February's Grammys, according to a producer of the event.

Katy Perry is Elizabeth Taylor and Mariah Carey is Marie Antoinette in the September issue of Harper's Bazaar.

With all Internet memes comes monetization, and so it is that Katy Perry's Super Bowl shark dancers have their own commercial.

Katy Perry and Beyonce Knowles have been added to the list of performers the 57th annual Grammy Awards on Sunday night.

Katy Perry showed the world that she is, indeed, a "firework" as she lit up the University of Phoenix Stadium during the 49th Super Bowl halftime show in front of millions of viewers worldwide.

SoundHound has announced its top songs, artists and albums of 2014 as identified by users of its SoundHound app. John Legend's single "All of Me," Katy Perry's album "Prism" and artist Pitbull were No. 1 for SoundHound this year.

Katy Perry just won the Internet -- 'Dark Horse' is the most-viewed YouTube music video of 2014!