Michael Buble, 34, is engaged to his Argentinean actress girlfriend, Luisana Loreley Lopilato de la Torre, 22. The loved-up couple met after one of Michael’s concerts in Buenos Aires in November 2008. Michael personally designed the diamond engagement ring and proposed to Luisana in front of her adoring parents two months ago. No date has been set for the wedding as of yet, but the families have met and are reportedly very happy for the couple. Buble was previously engaged to singer and actress Debbie Timuss and dated actress Emily Blunt for over two years. –MANDY COHEN in London