Ms Chambers said the way ticket sales were tracking a number of other concerts were going to sell out, including the high-energy Hurricane Party down on the waterfront.
Ms Chambers said 25,000 brochures had been snapped up and more had to be printed because of the huge interest.
"We were also over-subscribed for the 39th National Youth Jazz Competition and were inundated with applications from school bands from all over the country."
Nine big bands, including one from Christchurch Boys' High, and three from Tauranga, would perform on Easter Saturday, and 17 combo bands on Good Friday - four more than last festival.
Ms Chambers said during the festival, some 50 bands would perform across 16 events.