Katy Perry has been sued by Christian rap star Flame after he claimed that the singer stole his song Joyful Noise in Dark Horse. In Perry’s Dark Horse video she refers to the Ancient Egyptians and has been quoted as saying that the track was inspired by witchcraft film The Craft, with the song written from a witch’s point of view.

Katy Perry surpassed Justin Bieber as the most followed person on Twitter in November 2013. Pic/Getty Images.