Manurewa High School student Joshua Stylah's viral hit 'Laxed (Siren Beat)' ended up as Jason Derulo & Jawsh 685 - 'Savage Love' and is currently at the top of the worldwide iTunes chart.
Jennifer Lopez, Lizzo and Jimmy Fallon have all danced to his beat.
The 17-year-old musician and producer said he only started making music on his computer in February 2019.
The chart-topping tune was made in his tiny bedroom, he said.
"I loved it. I loved making it.
"I made it for people to blast it on sirens and have fun. I've never owned a siren myself."