Michael Bublé is opening up about a difficult period in his life on The Voice.

As he prepped contestants Aliyah Khaylyn and Sofronio Vasquez for their battle round on Tuesday, Oct. 29, the Canadian crooner wore his heart on his sleeve as he detailed the meaningful story behind his song “Forever Now.”

“I have a question. What is an original that was very vulnerable for you to release?” Khaylyn asked Bublé, 49.

“I wrote a song about my kids,” he responded. “Truthfully, I labored releasing it because my son had gone through a pretty public health battle and it’s one of those songs where I didn’t think I’d ever sing it live.”

“And then my son was OK and I started to find the strength to do it live,” he continued, referencing his son Noah’s liver cancer diagnosis. “The first times I did it I was a mess, and then the more I did it the more therapeutic it was.”

Bublé then said that song was “Forever Now” and to him it means, “no matter what you do I’m forever proud of you and I’ll love you forever now.”

Khaylyn and Vasquez were both touched by his confession.

“For Michael to share that, I’m very appreciative. He’s ready to help. Especially as an artist but as a human being the connection is there. I really love that,” Vasquez said in a sit-down interview.

During an appearance on the Diary of a CEO podcast last December, the “Sway” singer said his son’s diagnosis “rocked my world.”

“And that was a sledgehammer to my reality. And I will never be carefree and that’s okay. It is a privilege for me to exist and that pain, the fear, the suffering that comes with those sort of things is I guess it’s part of that beautiful, this life,” he told host Steven Bartlett.

Bublé’s son Noah was diagnosed with liver cancer in 2016 at age 3 and he’s been in remission since 2017.

In 2021, Bublé opened up to PEOPLE about how the diagnosis changed him, saying, “I live a much deeper life now.”

“I don’t wish that kind of pain upon any human being, but I do feel that when you’ve truly suffered, when you’ve truly felt fear and loss, it allows you to live a deeper life,” said Bublé. “Once you’ve felt those things, you are able, in context, to truly feel joy, gratitude and happiness.”

“My grandpa used to say, ‘Today’s curse is tomorrow’s blessing,’ ” he continued. “Even though for some of us who have lost so much these last few years, whether it’s our jobs or our loved ones, it doesn’t all come with negative connotations. There’s always a silver lining to that cloud.”

The Voice airs Mondays and Tuesdays on NBC at 8 p.m. ET, and is available to stream on Peacock the next day.