A duet withTony Bennettwill mark Amy Winehouse’sMark Ronson’sCarrie Underwoodand Josh Groban, among others. Bublé has spoken of the honour of working with the crooner, saying Bennett is in a league of his own. “You're talking about some adult contemporary acts, you're talking about some real pop acts, but the correlation between all of us is that we idolise him. He's an icon, and he's still doing what he does better than anybody else.”

Amy is still hard at work on her long-awaited follow-up to Alex Clarefor a year before her famous union with Blake Fielder-Civil. Alex’s first single, Too Close, is released next month with an album tofollowand it has been reported that he will reveal secrets from their year together in his lyrics.

"Amy is petrified that Alex will reveal everything about their relationship in his songs,” a source told The Sun. “The worst thing is the music is really good so she knows he is heading for the big time."