Michael Bublé has said he regrets being "reckless with hearts" when he first found global fame.
The 41-year-old singer, who is married to Argentine actress Luisana Lopilato, said he "handled success very poorly" at the beginning of his career.
Bublé was signed to Warner Brothers in his mid-20s after being told by previous managers that his music would never sell records, but he said his quick rise to stardom came with problems.
"Fame stunts your growth," he told BBC Radio 4. "I handled it very poorly. I regret the way I treated a lot of my family and even myself.
"I was reckless with hearts. But I got my karma.
"Early on I wasn't equipped to handle it. That's why you have to have people around you who love you enough to put you in your place."
Commenting on his previous addiction to marijuana, he said that his life changed around when he started a family with his wife.
He said: "We all battle with our own demons. A lot changed when I had kids."
Adding that he would never prioritise music over his relationship with his two sons, Noah and Elias, he said: "I won't allow that to happen.
"I get sick way too often...having young kids is like a petri dish of infections. My manager tells me I have to stay away from my kids and stop kissing them, but I would take getting sick a million times over for those kisses."
