Michael Buble didn't want to know the sex of his unborn baby.

The 'Haven't Met You Yet' hitmaker's wife Luisana Lopilato is pregnant with their first child, and though the couple recently found out they are expecting a boy, the singer had wanted to keep the gender a surprise but agreed to comply with his spouse's wishes.

He said: ''I didn't want to find out, but my wife did. She's the boss. She's carrying the baby, so she gets her say.''

Although Michael and Luisana were planning to start a family, news of his wife's pregnancy was still a ''genuine shock'' to the singer.

He said: ''I was genuinely shocked about the baby. We'd been planning... but, hey, good luck planning.

''And also, my wife lied to me. Well, she didn't exactly lie, but she knew she was pregnant but didn't tell me because she wanted to come to Vancouver and tell me in person, to surprise me. So I was in shock completely.''