Instagram (maskedsingerfox) & Santiago Felipe (Getty Images)
During the season 10 kickoff special on Sept. 10, Demi Lovato was revealed as Anonymouse. However, she won't be competiting, it was a special one-time appearance.
"I wanted to be on your show," she told host Nick Cannon during the episode, "because it seemed so fun, and it has been so fun. And I get to sing, so its the best of both worlds."