I have never figured out why Trans-Siberian Orchestra became a hot holiday staple in holiday music today second to Mannheim Steamroller? Is it because Trans-Siberian Orchestra brings a unique sound to Christmas music or is it because they have a big following of fans? Every so often it seems that their duet version of Carol Of The Bells with Mannheim Steamroller is their most popular song and Trans-Siberian Orchestra has also performed on talk shows too and I think they have copied Mannheim Steamroller