November 2010.

Engaged Luisana Lopilato and Michael Buble were spotted in the car at Buenos Aires on January 2010.Luisana was proudly showing off her diamond ring and they both seemed very excited!
Singer Michael Buble is honoring his Argentinian fiancee Luisana Lopilato's heritage - by following tradition and wearing an engagement ring.
The "Home" hitmaker proposed to the actress/singer last November and presented her with a sparkling diamond.
But she isn't the only one sporting a new piece of jewelry - Buble showed off his own band on his left ring finger during a concert in Canada on Monday night.
He told the crowd, "The boy also wears the engagement ring (in Argentina). That's what she tells me anyway.''