As is tradition in Argentina the pair, who became officially man and wife on Thursday, threw the religious ceremony for 300 guests on Saturday night.
They will hold a third, even bigger, wedding party in Buble's native Canada next month but last night they were enjoying their second 'wedding' in a beautiful Argentinian palace on the outskirts of the nation's capital.
Michael, 35, revealed that he will be giving his vocal cords a rest on the big day, as his fiancée has asked him not to sing at their wedding, instead preferring the musical stylings of Argentine-Venezuelan singer Ricardo Montaner.
In an interview with Ross King on Daybreak in December, Michael said: 'I asked my fiancée if she wanted me to sing and she said no.'
Lopilato, 23, said, "I want Ricardo Montaner". So now I’ve got Ricardo Montaner coming!'
In a grand act of charity, the couple have chosen to opt out of a lavish honeymoon to instead head to Africa to undergo charity work for children's causes.
Lopilato, an actress who stars in the hit Argentine soap opera Atraccion x 4, met Michael after one of his concerts in Buenos Aires in November 2008.
A friend revealed: 'They met at a party the record company threw for him after his show in Buenos Aires.
'The head of the label wanted to introduce Michael to Argentina's most famous actress.
'When he met her, he said it was love at first sight.'
He then popped the question while on a trip to Argentina in November 2009.
Michael was previously engaged to long-term girlfriend, singer and actress Debbie Timuss, but the couple split up in November 2005.
He also dated The Devil Wears Prada actress Emily Blunt for more than two years, but the pair split in 2008