 Björk has collaborated with a number of artists and songwriters throughout her career, including Nellee Hooper, Sjón, Mark Bell, Anohni and Arca.Björk's recorded output also encompasses songs recorded for motion pictures.She has composed theme songs for "The Young Americans" (1993), "Anton" (1996), "Being John Malkovich" (1999) and "Hot Chocolate" (2005).