Happy 4th of July! Celebrate the stars and bars with all-American jams from Katy Perry, Demi Lovato, Taylor Swift and more.
"Hopefully this cover can be an inspiration to women," she added in an Instagram caption.
Katy Perry is reportedly interested in purchasing a historic Hollywood convent, but a group of nuns aren't too pleased about it.
Harry Styles, Anna Kendrick, Katy Perry and more stars react to the U.S. Supreme Court's historic decision.
Jeremy Scott's upcoming documentary about his life gets a boost from interviews with Katy Perry, Rita Ora and Miley Cyrus.
Which pop superstar reigns in the sand in 2015: Beyoncé or Katy Perry?
Which celebrity has your fave beach bod?
Madge gathers a few of her famous friends to celebrate the world's greatest pop star: Herself.
Hillary Clinton cracks that Millennial demo with a motivational playlist featuring Katy Perry, Ariana Grande and a few deep cuts.
Madge confirmed the Instagram rumor in a tweeted teaser poster.