 In the United States, the lead vocals on the track were performed by American singer Shawn Christopher, and in Europe vocal duties were performed by a woman known only as "Pasquale".Distinctions of this song are that it is based on a single note (F-natural) and that it gradually slows down to a complete stop, marked by the sound of female moans, and then gradually speeding up.This was an innovative feature for any dance track at that time.