Duets have always been a huge part of country music. We have had some amazing duos and some cool one time pairings as well. From Conway and Loretta to Porter and Dolly to Bon Jovi and Jennifer Nettles, country music has seen a lot of cool partnerships.

On this date in 1984 perhaps the strangest pairing ever to top the charts happened. It was 31 years ago today that Willie Nelson and Julio Iglesias were sitting at number one with "To All the Girls I've Loved Before". Who in their strange twisted mind would have ever put these completely different voices and styles together? I bet it was Willie's idea after some deep breathing exercises on his bus. Take a trip back and relive this odd moment of music history.

Johnny Carson couldn't resist doing his Willie impression to surprise Julio on the Tonight Show in 1984.

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