He said: "That sounds like a f***ing great idea, are you mother f****s ready for a f***ing great night?"
Of course, it was all a fun bit in the name of charity, but with a live broadcast, Three was unable to censor it so all three f-bombs rang out in lounges across the country.
Ah well, all in the name of charity eh, Jon?
Meanwhile, The Beths kicked off the ceremony with a performance of their hit Little Death and Six60 took home the first award of the evening for Radio Airplay Record of the year.
Earlier, PM Jacinda Ardern walked the red carpet and acknowledged "the incredible talent we've had come through this year" saying "I know we're all really super proud of all of our musicians".
She said: "This is part of who we are as a nation, so much of our conscience, our major historic moments are all captured by our artists... so great to be here."