The Masked Singer NZ: Opshop singer Jason Kerrison as Tuatara wins first season

Kiwi singer Jason Kerrison won The Masked Singer NZ on Sunday night, revealing himself as Tuatara and beating 11 other celebrity performers for the coveted title. 

Kerrison sang a rendition of Queen's 'Somebody to Love' for the competition's grand final before he took out the trophy.

Also in the final three was True Bliss star and radio host Joe Cotton, who was unmasked as Medusa, and singer/songwriter Troy Kingi, who was revealed as Sheep.

The show's guessing panel had mixed ideas about Tuatara's identity, with Rhys Darby thinking it could be fellow comedians Jason Hoyt or Jemaine Clement, while James Roque was convinced the singer was X Factor NZ alumni Benny Tipene.

Both Sharyn Casey and Ladi6 correctly guessed Kerrison as the man behind the scaly mask.

Kerrison said that at first he felt "weirded out" by the premise of the show - dressing up in an elaborate costume to compete in a national televised singing competition. 

"But once I checked it out and saw that Gladys Knight, Chaka Khan, John Legend, Dion Warwick, Patti LaBelle and Joss Stone - among other legends - had done it, I kinda realised I may have been taking myself too seriously and thought, bugger it, let's have some fun!" he said in a statement.

"I jumped into the idea of this being a really fun show, trying my best to mask my voice whilst paying homage to some great songs and singers. I got competitive... really competitive."

Kerrison said he picked songs that would push his abilities, and then "deliberately oversang the shit out of everything to impress the guessing panel".

"I even made up dance routines in the green room. I never thought I'd win it though, much less be guessed as a professional dancer or Olympian for that matter. What the actual heck?"

The win comes as Kerrison is set to drop a new single called 'The Timing' from his upcoming first solo album.