"Christmas Tree" is a song by American singer Lady Gaga. It was released on December 16, 2008, for digital download. It was written and produced by Gaga, Martin Kierszenbaum, and Space Cowboy, who also provides guest vocals. Musically, "Christmas Tree" is a Christmas song with dance-pop and synthpop influences. 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.