Katy Perry offended Christians with her performance on the Grammys -- and now she's ticking off the world's Muslim population as well.
An Islamic group has started an online petition to get Katy's "Dark Horse" video pulled from YouTube because of scenes it deems blasphemous -- notably one where she uses magical powers to turn a man into dust, even though he's wearing a pendant depicting the Arabic word for God.
The petition, which racked up 45,000 signatures in its first 24 hours online, says, "Blasphemy is clearly conveyed in the video, since Katy Perry (who appears to be representing an opposition of God) engulfs the believer and the word God in flames. Using the name of God in an irrelevant and distasteful manner would be considered inappropriate by any religion."
A number of Christian groups expressed outrage at Katy's Grammy night performance, which used images associated with witchcraft and, in some eyes, Satanism.