Michael Buble unveiled the catastrophic news that his 3-year-old son Noah was diagnosed with cancer last week, and while neither he nor his Argentine wife Luisana Lopilato have released anymore statements regarding their agony, a relative has stepped forward to dismiss claims that he's battling leukaemia.

Michael BubleMichael Buble's sister-in-law confirms it isn't leukaemia

Luisana's sister Daniela Lopilato apparently spoke to an Argentinian journalist named Tomas Dente for a TV show yesterday (November 6th 2016), insisting that the media do not speculate on the family's situation but shooting down rumours that the cancer is leukaemia or nervous system related.

'To tell you the truth, I'm devastated. This is very recent', she texted Dente, according to the Daily Express. 'The only thing I ask if that you don't speculate because not everyone has children and can understand what this means. Michael and my sister will publish more statements and I can't say anymore but it's not leukaemia or the central nervous system like people are saying.'

Michael's sister Brandee Buble has also spoken out about the heartbreaking news, posting snap on Instagram with the message: 'And now these three remain: faith, hope and love. But the greatest of these is love.'

And we've got a lot....??

A photo posted by Brandee Bublé (@brandeebuble) on

Former 'Charmed' star Shannen Doherty, who is currently undergoing chemotherapy and radiotherapy treatment after her breast cancer spread, shared her own thoughts on Michael Buble's devastating ordeal, offering some valuable advice. 'Make sure you have amazing doctors, a great team and know that organizations like the American Cancer Society, Stand Up to Cancer, they are doing so much good for cancer', she told Entertainment Tonight this weekend. 'Stay positive. That positivity, that outlook on life that you can get through something, it actually does get you through.'

More: Michael Buble confirms son's cancer diagnosis

Michael and Luisana confirmed the sad news last week (November 4th 2016), revealing that Noah is currently undergoing treatment in the States. 'Luisana and I have put our careers on hold in order to devote all our time and attention to helping Noah get well', he wrote on Facebook. 'At this difficult time, we ask only for your prayers and respect for our privacy. We have a long journey in front of us and hope that with the support of family, friends and fans around the world, we will win this battle, God willing.'