Share
In the video the comedian, 44, appeared to be in great spirits as he watched the performances and even excitedly guessed that one person could be Cher.
The show has sparked dozens of theories over who is behind the remaining seven masked singers, with Stacey Solomon, Aston Merrygold and Lenny Henry all tipped as competing in the show.
Special appearance! Comedian Alan Carr will be joining the judging panel for one night only
Last week actor John Thomson was revealed to be Bush Baby after becoming the latest character to be eliminated.
The Cold Feet star, 51, was one of the first celebrities who the panel failed to guess ahead of his unmasking, after completely throwing viewers with a fake Australian accent.