The Trans-Siberian Orchestra (TSO) is an American rock band founded in 1996 by composer and producer Paul O'Neill. Known for its unique blend of rock music with classical elements, TSO gained fame for its elaborate live performances, especially during the holiday season. Their most popular work, "Christmas Eve and Other Stories," features a mix of original songs and traditional carols. TSO's concerts are characterized by stunning visual effects, intricate light shows, and a full orchestra, creating a theatrical experience. The band has released several albums, including "The Christmas Attic" and "Beethoven's Last Night," showcasing their diverse musical style and storytelling approach.