You gotta hand it to Juicy J. Who would’ve ever predicted that a member of Three 6 Mafia would go on to do songs with Miley Cyrus, Justin Timberlake, and now, Katy Perry? I’m pretty sure that the Dr. Luke connection between the two artists probably made “Dark Horse” happen. This is not the worst thing I’ve ever heard but it’s not making it in my iTunes. Off Katy Perry’s upcoming album Prism.