Michael Buble "doesn't care" whether he has another baby boy or girl.

Michael Buble and Luisa Lopilato are expecting their fourth child

Michael Buble and Luisa Lopilato are expecting their fourth child

The 46-year-old singer - who has kids Noah, eight, Elias, six, and three-year-old Vida with his wife Luisana Lopilato - admitted he will be happy regardless or whether there's a new son or daughter being added to their brood, and the proud parents are "so excited" for their new arrival.

He told OK! magazine: "We're due late summer - I think. I'm bad with this stuff. We're so excited - overwhelmed but excited.

"I don't care whether it's a boy or a girl. For me, it's the same thing. I love having boys and wrestling. And I love watching 'Matilda' for the 50 millionth time."

The 'Higher' hitmaker admitted he might have been more keen on another baby than his wife, who "changed her mind" a couple of times.

He added: "It was more me than Lu, I think. She did want more and then she changed her mind. Then changed her mind again! Love is expensive but it's worth it."

Michael - who is delighted now their son Noah is cancer free, having been diagnosed with the liver cancer hepatoblastoma aged just three in 2016 - also opened up on their bond as a couple, and why they work so well as husband and wife.

He explained: "You find out who someone is when the s*** hits the fans. And I found out my wife is my hero.

"I found out that I was so lucky when I married that woman because that's a substantial human being right there.

"She lifted us up through some really tough, unthinkable things and that's amazing. She definitely saw the worst in me - and she still loved me."