MIRANDA LAMBERT and BLAKE SHELTON

Fellow country singer Lambert was such a fan of Buble's 2005 track she put it on Shelton's iPod, so he could think of her when he heard the song on tour.

But he did more than that when the tune started becoming a favourite of his.

He tells America's USA Today newspaper, "The more I listened, the more I thought, 'That's not just an adult-contemporary record, that's a country hit, too.'"

Source: WENN