Michael Bublé Welcomes Baby No. 2, See The Family Photo! (PHOTO)

And a baby makes four! Michael Bublé and wife, Argentinean model-actress Luisana Lopilato, welcomed their second child, baby boy Elias Bublé, into the world this past Friday. The four-time Grammy Award-winning singer made the exciting announcement of his son's birth via social media.

"And then there were 4. Introducing Noah's little brother Elias Bublé @lulopilato #family #blessed #brothers," he captioned a photo of himself with Luisana holding their newborn son. He added the hashtags, "#family #blessed #brothers."

The couple, who married in 2011, are already parents to two-year-old Noah born in August 2013.

"I love everything about the kid," Bublé previously told Us Weekly about being a parent. "Instead of being nervous like I used to at events, I actually sit beforehand and say, 'You're Noah's dad first, and all of this other stuff is just icing on the cake.'"

Last July, Bublé and his wife announced they were expecting their second child by posting an adorable video of his son pointing to Lopilato's tummy as she lies on the floor with Britney Spears' "Oops!...I Did It Again!" playing in the background. In the video, Buble is heard saying, "Who's that in there?" to which Noah responds by putting his hands on his Mommy's tummy and says "Baby!"

Bublé captioned the video, "Noah has some news for to tell you ..."

Bublé recently opened up to People Magazine about him and Lopilato would welcoming the idea of having a big family, saying, "Me and my wife would really love to have three or four, five [kids], if we're blessed to do that. And if we can't do it naturally, then we'll do it another way - we'll adopt."