Did you guess who it was?
Even though this week was Clues Week - with each song giving a clue to the singer's real name or personality - we're pretty certain nobody could have guessed who Bush Baby was.
After singing Engelbert Humperdinck's 'Release Me', the judges voted to unmask Bush Baby and was subsequently revealed as actor / comedian John Thomson, best known for 'Cold Feet', 'The Fast Show', 'Corrie', and many more.
Removing his costume on stage, Thomson admitted with a laugh that "as a Northerner who doesn't feel the cold, and is already covered in hair... it's not been the greatest." By all accounts, most of the judges were amazed by Thomson's reveal.
Indeed, the only one who seemed to catch the clue was Jonathan Ross, who correctly pointed out that 'Release Me' was the title song for 'The Fast Show', which Thomson was one of the main cast members alongside Paul Whitehouse, Caroline Aherne, and Charlie Higson.
Here's the moment Thomson was revealed.
The big question now, however, is who's left and what do their clues tell us? Harlequin, for example, sang 'Fast Car' by Tracy Chapman - which could very well indicate that they've got something to do with racing? Dragon, who was nearly unmasked last night, sang Celine Dion's 'All By Myself' - but it's anyone's guess what the significance there is.
Next week's show will be a double-elimination, with comedian Alan Carr joining the judges' panel for a guest spot, so expect there to be more dramatic reveals then.