The glorious Katy Perry is back again with another single off her new album "Prism" which hits iTunes and stores (if you still buy CDs at FYE) on October 22nd. This new tune, entitled "Dark Horse" is an instant download when you pre-order Perry's upcoming album, and is the second song behind "Roar" to be revealed. Featuring the likes of Juicy J, "Dark Horse" blurs the lines between trap and pop and potentially exposes a different audience to the "California Girls" pop-star. Despite her MTV VMA performance of "Roar" and the aura and chart-topper it has become, we remain patient with her latest single, as the buzz will only continue once the full album releases later in October. Enjoy!