The song is often misnamed "Carol of the Bells" (due to its use of the melody) on file-sharing networks. As such, it has also been incorrectly linked to Metallica or Mannheim Steamroller (who themselves have several instrumental Christmas music hits, including its own rendition of Carol of the Bells) rather than accurately being attributed to either Savatage or the Trans-Siberian Orchestra.
http://en.wikipedia.org/wiki/Christmas_Eve/Sarajevo_12/24