"Regardless of the outcome, Mitch has already won. It's not about winning for him, it's about the message, it's about youth engagement and bringing people together," Mrs Parker said.

The Gamilaraay performer delivered his message - one of harmony - after his golden buzzer semi-final performance on Sunday and during his first appearance on AGT.

And from what Mrs Parker's seen, through social media and in person as well, she believes the message is being received.

"Mitch is a humanitarian. I sat back there and watched him (in the AGT semi-final), I was looking at him as an indigenous woman - not his mother - and he has become the people's man whether you're indigenous or non-indigenous," she said.

"He's reaching people from all regions and minorities, that message is going to them...I just cry with pride.

Mrs Parker added: "Tamworth has been so supportive along with all of our people and community, it has lit us all up. The messages I've got from our young youth - last week actually - was 'we've had so many negatives but Mitch is giving us something positive'."

Mrs Parker, a teacher at Oxley High School, is a performer at heart with a background in musical theatre.

So it comes as no surprise as to where Tambo's creative streak comes from.

"I haven't pushed him in any way, it (performing) was something that was born in Mitch," Mrs Parker said.

The AGT grand final will air at 7pm, Sunday. People can vote via SMS, the 7plus app or 7plus.com.au. Ricki-Lee Coulter will announce when voting has opened and closed during the show.