"I saw it on Facebook and me and my mum talked about it. We were like: 'Oh well, you never know until you try'.
"So we just gave it in and yeah, here I am,'' she said, smiling.
The teenager is not new to the stage, taking part in kapa haka and having won a singing competition run by Kiwi children's show What Now in 2013 - when she was 11.
She blew audiences away in the audition rounds, when she sang covers of David Guetta's Titanium, featuring Sia, and Alicia Keys' This Girl Is On Fire.
As well as te reo, Moana has also been translated into Tahitian and French.
The te reo version of the film is due to be released in September.