The 'Home' singer popped the question to Argentinean girlfriend Luisana Lopilato in November and presented her with a unique ring he designed himself.

His representative Liz Rosenberg said: "Michael proposed to Luisana in November, in front of her family in Argentina. They're ecstatic. They're adorable, in love and laugh all day long."

The couple - who began dating in 2008 – are yet to set a wedding date.

Luisana was thrilled with her ring, which was made by Vancouver jewellers Minichiello.

A friend added: "He designed the setting himself. He's very proud to be engaged to her."

Michael – who previously dated actress Emily Blunt – recently revealed how Luisana thought he was gay because he spent most of the night talking to her male friend when they first met.

He said: "I don't speak Spanish and she had no English. But the guy did so I just spoke to him. I was a bit nervous because of how beautiful she was.

"I later found out she was on the phone to her mother the whole time saying, 'Buble's gay. He's hitting on my friend.''