The group took the stage wearing a typical choir outfit that seemed quite lovely and mild-mannered and then they started singing.
The Dremeka Choir was one of the only metal choirs in the world, launched into "O Fortuna," followed by a cover of Britney Spears's "Toxic" that sounded like it came straight from the depths of hell.
Heidi Klum did not like that one. She hit her "X" buzzer in the middle. She said, "I didn’t particularly love it, I don’t think that people would necessarily buy a ticket to come and watch that."