Get "Dark Horse" feat. Juicy J from Katy Perry's PRISM: http://smarturl.it/PRISMDo you want to play with magic? Insert yourself into the video using #DarkHorseCam: http://andCam.com/DarkHorseTHE PRISMATIC WORLD TOUR coming to you soon: http://www.katyperry.com/eventsFollow Katy Perry:http://www.katyperry.comhttp://youtube.com/katyperryhttp://twitter.com/katyperryhttp://facebook.com/katyperryhttp://instagram.com/katyperry