Katy Perry: 'Prism' Singer Opens Up to Elle UK [PHOTOS]: Addresses Rihanna Friendship, Robert Pattinson, John Mayer, Behind the Scenes [VIDEO], And More

Katy Prry just announced the release of her third album, "Prism," and the first single titles "Roar," as the Grammy Award winnign songstress prepares for promo take over, she lands her first Elle UK cover ever on the Septermber 2013 issue. Donning Prada, Louis Vuitton, Miu Miu, Alexander Wang, and more Katy glows as she opens up about John Mayer, new music, and her friendship with Rihanna. Read More »