Xmas Jam Countdown: The Hives and Cyndi Lauper, "A Christmas Duel"
(Each day until Christmas, A to Z will be posting a Christmas/holiday-themed MP3 in honor of the festive season, in hopes of warding off the seasonal blahs. Check back every day for a new nugget of sonic bliss.)
This bit of awesomeness needs no explanation, although the Hives' official site explains the origin of its existence. The song is available now.