Michael, 35, met actress and model Luisana, 23, when she starred in his music video for Haven't Met You Yet and proposed to her in November 2009.
The couple became husband and wife in a civil ceremony in Buenos Aires yesterday in the first of 3 planned 'weddings'.
Luisana wore a simple lilac minidress and carried a a bouquest of pink orchids.
The new Mr and Mrs Buble will have a big bash with 300 guests to celebrate in South America, then another in Canada.
‘We have one in Argentina for her family and a few of my family,' says Michael, 35.
‘And then I have a thing called an unwedding a month later in Vancouver.
‘It's not a wedding, it's like a big party.'
Michael insists he isn't worried about his extended nuptials, as long as his bride has fun.
‘I'm not nervous at all,' Michael revealed on Live! with Regis & Kelly.
‘I just want it to be good for her.
‘For me, it's one of those things where I say, "Just tell me what to do", it doesn't matter what it costs, let's make it right.'
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