One Masked Singer fan said on Twitter: “I think it’s Billie Joe Armstrong! He’s from California..surf boards, green turtle..green day!
“The turtle is totally punked out with leather and a Mohawk. And tonight his teacher said ‘I hope you have the time of your life’.”
A second also picked up on the colour of the costume: “Whoever the Turtle is, I think they’re from Green Day, which’s why they picked a green costume and Billie Joe Armstrong is the lead singer of Green Day. I think it’s Billie Joe Armstrong.”
While a third confidently yet simply weighed in: “#TheMaskedSinger the turtle is Billie Joe Armstrong from Green Day.”