After an overwhelming response from John Rich's surprise guest appearance on Late Night with Jimmy Fallon week, their classically inappropriate duet, "Drunk on Christmas," will be available exclusively on iTunes worldwide today.

Decked out in a red velvet Santa costume and golden cowboy boots, the country superstar made a surprise visit to the late night show last Thursday to help the host shed some holiday cheer with the catchy tune.

Written by Gerard Bradford and Jimmy Fallon, "Drunk on Christmas" is the perfect holiday antidote to dysfunctional family gatherings and is the ultimate remedy to get through the sometimes-stressful holiday season.

Click here to watch the hilarious clip of their performance.

For more information on John Rich, visit www.JohnRich.com.