Michael Buble Says Son Noah is 'Progressing Well' During Cancer Treatment in Emotional Message to Fans

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Good news for the Buble family!

On Friday, Michael Buble shared in a Facebook post that his 3-year-old son, Noah, has been responding well to cancer treatment. In November, the Canadian singer announced Noah was diagnosed with cancer, and put his career on hold in order to care for his eldest child.

"We are so grateful to report that our son Noah has been progressing well during his treatment and the doctors are very optimistic about the future for our little boy," Buble and his wife, 29-year-old Argentine actress Luisana Lopilato, said in a statement. "He has been brave throughout and we continue to be inspired by his courage. We thank God for the strength he has given all of us."

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"Our gratitude to his doctors and caretakers cannot be put into words," he continued. "We'd also like to thank the thousands of people that have sent their prayers and good wishes to us. As we continue this journey, we are greatly comforted by your support and love."

Noah has been receiving his treatment in Los Angeles. Earlier this month, 41-year-old Buble backed out of hosting the BRIT Awards, which is the U.K. equivalent of the GRAMMYs, to care for him.

A source close to Buble tells ET that the singer has been 100 percent focused on Noah's treatment.

"Michael meant it when he said he was going to step away from the spotlight," the source says. "He stopped all his work commitments and completely shut off his social media. He's been with his son every day."

"He has a great rapport with the doctor and is getting the best care for his son," the source adds. "It's really just family and very close friends that he's communicating with. This experience has changed him -- as you can imagine, it's caused him to re-prioritize everything. Until his son is better, nothing else matters."

ET spoke to Buble last October, when he gushed about the love he has for Noah, as well as his youngest son, 1-year-old Elias.

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"I love them more than I'll ever love anything, or anyone in the whole universe," he said. "I think it gave me perspective on life that I think I very badly needed. It's hard to be able to quantify that level of love."

"I didn't even know that there was that color in the spectrum," he added. "I didn't know that level of love existed. But it makes me better at everything. It allows me to pull more emotion and be more honest and to be in the moment."

Watch below:

-- Additional reporting by Darla Murray