Michael Bublé ''regrets'' the way he treated people when he first found fame.

The 41-year-old singer scored a record deal when he was in his 20s and has admitted his behaviour at first was really ''reckless'' but he got his karma.

Speaking on UK radio station BBC Radio 4, the 'Feeling Good' hitmaker said: ''Fame stunts your growth. 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.''

And Michael - who has battled with a marijuana addiction - believes his life changed when he met his wife Luisana Lopilato and started a family with her.

He added: ''We all battle with our own demons. A lot changed when I had kids.''

The 'Haven't Met You Yet' musician has been changed by his sons - three-year-old Noah and nine-month-old Elias - that he'd never choose his music over his family.

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.''

The star previously gushed about how having children has been a ''massive blessing''.

He said: ''I think being a dad gives you perspective. I think really being a parent is a massive blessing.

''It's allowed me to understand deeply that what I do for a living -- creating music and art and getting to be a part of a fragrance or a movie -- is my job. It isn't what defines me. What defines me is I'm Noah and Eli's dad.''