The Christian rappers are from Missouri, and they claim Perry copied one of their hit songs. Listen to it here.
According to the Saint Louis Post-Dispatch, the Christian song "Joyful Noise" was written in 2007 and released in 2008. The lawsuit points out that their song received a 2008 Gospel Music Association Dove Award nomination for the best rap/hip-hop song.
The suit claims Perry's song, "Dark Horse," not only rips off their music, but its given them a bum rap by tarnishing their image with witchcraft, black magic and Illuminati imagery.
Perry's group has not yet commented on the suit. You can listen to Perry's song here.