Everyone in the music business knows the story.

It was Shania Twain and Robert 'Mutt' Lange.

Their best friends were married couple Marie- Anne Thiebaud and Frederic Thiebaud.

Then Robert Lange ran off with Marie-Anne.

So Shania Twain and Frederic got married.

It was literally a wife swap.

Robert Lange is still living his life with new-wife Marie-Anne mostly in Switzerland and is still writing songs and producing. Although, he's most known for producing and writing many of the tracks on Shania Twain's huge album, 'Come On Over', he has recently worked with Lady Gaga and recently won a Grammy for Best Rock Album producing the album 'Drones' by the band Muse.

Here's Shania Twain and new husband they call simply, Fred!