Raffles, an auction and face-painting will also be on the programme, and food and drinks will be available.
"Te Rina started singing five or six years ago - she gets it from her dad - and she loves it," Mrs Kahle said. "She has a soul/bluesy sort of voice, but does more modern stuff too.
And she's doing well at school; she hopes to study music at university."
She already had some big gigs on her CV, performing with Suzanne Prentice, 1814 and others, but Hollywood would be a whole new experience.
Event CEO Griff O'Neil said the championships were viewed as the Olympics for aspiring performing artists. Scholarships worth $380,000 would be awarded, with more than 100 agents, producers, casting directors and music industry reps judging and conducting seminars.
"All in all this is a rare opportunity for a privileged few," he said.
National director New Zealand Dina Janse Van Rensburg said being selected for Team New Zealand (aka the Black Stars) was a major accomplishment in itself.