Katy Perry certainly knows how to roar, with new songs, tours and videos as explosive as any firework. Our Katy Perry news reveals what she's up to on Instagram and Twitter. And while John Mayer and Russell Brand are ancient history, we have the newest intel on Katy Perry's newest boyfriend. Want Katy Perry perfume or learn the story behind her new tattoo? Or perhaps you just want hair and makeup tutorials to recreate one of the hairstyles Katy Perry snapped in her latest selfie. Plus: All the info you want on how to shop her clothes, fashion and outfits.