Composed and performed primarily by the Bee Gees, this album was certified 15× Platinum for shipments of over 15 million copies in the United States alone. The album stayed atop the album charts for 24 straight weeks from January to July 1978 and stayed on Billboard's album charts for 120 weeks until March 1980. In the UK, the album spent 18 consecutive weeks at #1. The album epitomized the disco phenomenon on both sides of the Atlantic and was an international sensation. The album has been added to the National Recording Registry in the Library of Congress for being culturally significant.