Katy Perry blatantly stole a song from a Christian hip-hop singer and then tarnished it with witchcraft, paganism and black magic, at least that's the claim in a new lawsuit. According to the suit, obtained by TMZ, Perry's hit song " Dark Horse " is a rip-off of an award-winning Christian gospel song called "Joyful Noise" that was released 5 years before Perry's track. The suit was filed by an artist known as Flame, along with other singers. They say Perry not only hijacked their religious music, but also destroyed their reputation in the Christian music world.