Every DJ has probably played it!

Every DJ has probably played it, (if they will admit it). The Singing Dogs and Jingle Bells. I know Christmas is past but this is an interesting story.
It's goes back farther than the 1970s release. Here's the story:
http://www.bobshannon.com/specials/dogs.html

Of course today, you could do it with a sampling keyboard in just a few minutes.