Festival co-organiser Alison Tay said nearly 250 pupils performed at the festival at the Dunedin Town Hall.
The choir consisted of pupils, aged between 9 and 13, from East Taieri School, Elmgrove School, Lee Stream School, Outram School, Silverstream School, St Mary's School, Taieri Beach School, Taieri College and Waihola School.
The biennial festival was usually held at Taieri College Hall but it was "out of action'' after a fire last year.
The Dunedin City Council allowed the festival to be held at the town hall free.
"We were very lucky, otherwise we had no other venue - there is no other venue on the Taieri that is big enough.''
Usually, the festival included individual school choirs but as some schools had a limited number of singers it would have been "daunting'' to harmonise on the town hall stage.
The school choirs united and about 400 people watched them perform nine songs including Can't Stop the Feeling! by Justin Timberlake, California Dreamin'by the Mamas and the Papas and a David Bowie medley of The Man Who Sold the World, Starman and Heroes.
The pupils had been rehearsing since April, Mrs Tay said.
"The kids have worked hard and it's such a big thing for them to perform in the town hall.
"That is something they will remember for their lives.''
