The Girls Aloud singer won the show but revealed she had a minor panic attack in her first dress rehearsal.
The former girlband member was confirmed to be Queen Bee as she won the ITV singing show.
The 39-year-old Welsh opera star laughed, "I am so good at this game!" as she revealed her identity to the shocked judges.
The actor and presenter was revealed to be Fox on the ITV show last weekend.
Scissor Sisters frontman Jake Shears and Skin from Skunk Anansie were the latest celebrities to be unmasked on the ITV singing show.
The former 'X Factor' judge revealed the cheeky reason she knew which celebrity was hiding behind the Unicorn mask on the ITV singing show.
The 53-year-old former England footballer revealed contestants have to wear balaclavas backstage to ensure their identity doesn’t get out.