Crooner Michael Buble and his model wife Luisana Lopilato have announced that they are expecting their first baby.

25-year-old Lopilato revealed the news yesterday with a homemade video and wrote on her website "Mike and I have big news for you", before linking to a YouTube video showing the first sonogram picture of the couple's unborn child. The video then cut to the parents-to-be with the message "We're having a baby Buble!"

The 37-year-old Canadian singer met his future wife in 2008 and the pair wed in two ceremonies in Vancouver and Buenos Aires in April 2011. She appeared in the video for his song Haven't Met You Yet.