"'A Colbert Christmas: The Greatest Gift of All!' will air Nov. 23 as a one-hour special...It will be a musical special featuring John Legend, Elvis Costello, Toby Keith, Willie Nelson, Feist _ and "The Daily Show" host Jon Stewart, who's slated to sing a duet with Colbert of a song simply titled "Hanukkah." (The song Colbert is to sing with Nelson appears to be a version of "The Little Drummer Boy" _ called "Little Dealer Boy.")""