Jennifer and I had a great time with @rickmulready at the funny or die holiday party a couple weeks ago. A highlight of the night was Will Ferrell, John C Reilly, and Adam McKay introducing a special funny or die Christmas video.
Will Ferrell and John C Reilly parodied an original video from 1977 where Bing Crosby and David Bowie collaborated to sing "Little Drummer Boy/Peace on Earth" for Bing's "Merrie Olde Christmas" TV special. Sadly, Bing passed away only a month after filming this song. Details about the odd collaboration were published by the Washington Post in December 2006.
Here's the original clip as published at VEVO.com. Good stuff and bizarre enough to be magical. I'm surprised I never saw this before. It's a holiday gem.
And here's Funny or Die's parody version. Incredibly faithful to the original which makes it creepy-funny-awesome. Laugh out loud funny at the end. Merry Christmas & enjoy.