The Masked Singer viewers believe Monster has finally been 'exposed' by their song choice.
Fans of the ultimate guessing game were given even more clues to Monster's identity, including that they come from a big music family and have grandchildren.
All of the chosen songs this week are linked to the mystery celebrity performing them, so fans are convinced that CeeLo Green is in the big blue costume.
Monster sang Pussycat Dolls banger 'Don't Cha', which features rapper Busta Rhymes, who co-wrote the song with it's producer - CeeLo Green.
However, there was a shock twist when special guest judge Donny Osmond dropped a 'woman' curveball.
When Davina McCall guessed that CeeLo was behind the mask, Donny suggested that he was not old enough.
Giving his take, Donny said: "I'm here to tell you that's not a man, that's a woman. Because I was listening to the voice, that's a female voice I think in there."
He also suggested that the lyric "your secret is safe with me" referred to the fact it was a girl pretending to be a boy.
Davina admitted she was "freaked out" by the curveball, while Rita Ora claimed whoever was in the mask was "completely messing" with her head.
Jonathan Ross added: "I think it's a female vocalist. Maybe Nicole Scherzinger. But she won't thank me for saying she's a grandmother."
The chat show host guessed it was Sheila Ferguson, Donny opted for Angela Bassett, while Rita chose Rag'n'Bone man.
Afterwards, Monster said: "What do I think of the panel's comments tonight? Total confusion means total domination. I love it."
The Masked Singer viewers rushed to Twitter to insist that Monster is in fact Cee Lo Green.
One viewer said: "Cee Lo Green wrote #Dontcha for the Pussycat Dolls, this Monster is 100% him."
"Cee-Lo Green produced Dont Cha. Don’t even know why they’re trying to take it away that it’s him when it blatantly is, "added another.
A third agreed: "Monster has got to be @CeeLoGreen he’s got grandkids, and sang a remix of Dont cha!"
*The Masked Singer airs Saturdays on ITV at 7pm
