High Quality Content by WIKIPEDIA articles! "Christmas Tree" is a song by American recording artist Lady Gaga. It was released on December 16, 2008 for digital download. It was written by Gaga and Rob Fusari and produced by Martin Kierszenbaum and Space Cowboy. It also features guest vocals from Space Cowboy. Musically, "Christmas Tree" is a Christmas song that uses influences of dance-pop and electropop. It samples the classic Christmas song "Deck the Halls", as well as briefly using the lyrics "Rum pum pum pum" from the Christmas song "The Little Drummer Boy" in its intro. Lyrically, the song uses sexual innuendos and metaphors.