South Seas chief executive Silao Vaisola-Sefo said it was successful because it was community-driven.
He said they wanted to take people on a journey through the process of getting vaccinated and to create a festival atmosphere.
Minister of Pacific Peoples Aupito William Sio said the numbers are impressive.
"A huge congratulations, absolutely proud of the leadership of the Bubble Gum group in leading that. Their efforts alongside other young people who are leading the charge are probably responsible for the huge uptake in the Covid-19 vaccine for that age group," he said.