After the private civil ceremony, the newlyweds — the singer in a grey suit and Argentine TV star in a purple dress — posed for pictures outside. The pair has planned a bigger celebration for 300 friends and family this weekend.
Bublé, 35, met Lopilato in 2008 after one of his concerts in Argentina. He proposed the following year in front of her family.
Last month, Bublé won the Grammy for traditional pop vocal album.