Rattle and Hum is the sixth studio album by rock band U2 and companion rockumentary directed by Phil Joanou, both released in 1988. The film and the album feature live recordings, covers, and new songs. To a greater extent than on their previous album, The Joshua Tree, the band explores American roots music, and incorporates elements of blues-rock, folk rock, and gospel in their sound. The motion picture was filmed primarily in the United States in late 1987 during the Joshua Tree Tour and it features their experiences with American music. Although Rattle and Hum was intended to represent the band paying tribute to rock legends, some critics accused U2 of trying to place themselves amongst the ranks of these artists. While critical reception was mixed, the album was a commercial success, reaching the number one spot in several countries and selling 14 million copies.