Hip-hop artist Flame is alleging that Katy Perry stole his 2008 rap/gospel song “Joyful Noise” to create “Dark Horse.” The rapper and his producers are seeking damages for Perry’s alleged use of their Grammy-nominated track for her first single released from Prism. As you may recall, Katy’s controversial music video for the song lead to a petition, signed by more than 60,000 people, asking for the alleged use of offensive religious imagery to be removed.