That was about to change, said the singer, promising to let fans in on more of his situation soon.
"I have a lot to share with you all and I have something special to show you soon. This thing we call life has taken me to places I would never have expected.
"Whatever you may have heard, I'm telling you now - you still know nothing!''
In recent weeks, the singer has been pictured looking markedly slim and gaunt at various public appearances, leading to fans suspecting he was battling health issues.
However, whatever health scares he is facing does not appear to have affected his singing voice. He has put on huge performances at events in the past few weeks, including at reggae festival One Love and during Waitangi Day festivities.
Late last month he was pictured with Prime Minister Jacinda Ardern at a youth programme and where Ardern thanked him for attending, "despite being unwell,'' she said.