"Obsession" is a 1983 song covered in 1984 by the group Animotion. The song hit number six in the United States, and number five in the United Kingdom in early 1985. "Obsession" was originally written and recorded as a duet by songwriter Holly Knight and musician Michael Des Barres in 1983. This version was played in the 1983 film A Night in Heaven, during a scene in which Christopher Atkins bumps and grinds in Lesley Ann Warren's face in sync with the rhythm of the song. The song was featured on the film's soundtrack and was also featured in the theatrical trailer to the 1986 film 9½ Weeks, starring Mickey Rourke and Kim Basinger. The Los Angeles-based synthpop band Animotion recorded a version of the tune for their self-titled debut album, released in 1984. This version became a success, and it remains Animotion's biggest hit. (from WIKIPEDIA)