In 2004, Björk released her fifth studio album, titled "Medúlla", composed almost entirely using human voices and sounds. Its first promotional single, "Oceania", was commissioned by the International Olympic Committee for the 2004 Summer Olympics and debuted at the 2004 Summer Olympics opening ceremony in Athens. The next year, Björk starred in and composed the soundtrack for Matthew Barney's "Drawing Restraint 9". Björk released her sixth studio album, "Volta", in 2007. The album was her first to reach the top 10 on Billboard 200 chart, while its first single "Earth Intruders" is Björk highest charting single on the Billboard Hot 100 chart. The 2009 release "Voltaïc", is a companion box-set consisting of live and remix recordings.