12/22/2010 06:45 am ET Updated Dec 06, 2017

Mailman, Andrew W.K. Sing 'Silent Night' In Impromptu Duet (VIDEO)

Andrew W.K.'s hot new internet video features an unexpected guest: Rodney the Mailman.

The singer-songwriter was in the Chicago offices of The Onion A.V. Club, recording a number of versions of "Silent Night" for their terrific "Holiday Undercover" series. At the end of the recording, the office mailman Rodney is coming through. He's sung on a couple of tracks in the Onion studio before, so the staff asks W.K. if he'd mind doing a duet with Rodney.

The result is nothing short of pure Christmas magic.

Watch the impromptu performance:

Andrew W.K. and Rodney The Mailman cover "Silent Night"

For more from the Holiday Undercover recordings, head to