Physical is the ninth full-length studio album by Australian singer-songwriter Olivia Newton-John, released on 13 October 1981 by MCA Records. The album was produced and partly written by her long-time producer John Farrar. Recorded and mixed at David J. Holman's studio in Hollywood, California, Physical became one of Newton-John's most controversial and sexual records, and her most successful studio album to date. Musically, the album features considerable use of synthesizers and explores lyrical themes such as love and relationships, sex, kinesthetics and environmental protection. Upon its release, the album received generally positive reviews from music critics, many of them considering it to be Newton-John's best work. The album charted high in several countries, including the United States, Japan and Newton-John's native Australia, becoming one of the most successful albums of the early 1980s. It also ranks among the best-selling albums by Australian solo artists, selling more than ten million copies worldwide. The album's title track was a commercial phenomenon, staying ten weeks atop the Billboard Hot 100; at the time, this tied the record set by Debby Boone's 1977 single "You Light Up My Life". The song and its music video were controversial, having been banned or edited by several radio stations and television channels (such as MTV) for its sexual references. The single was followed by "Make a Move on Me", another top worldwide hit. "Landslide", which failed to enter the majority of musical charts, had a music video featuring Newton-John's boyfriend (and later husband) Matt Lattanzi, to whom she had dedicated the album. A video compilation, Olivia Physical, was produced, featuring music videos of all songs from the album. The material was a commercial and critical success, and earned Newton-John a Grammy Award for Video of the Year. The album was promoted with Newton-John's 1982 North American Physical Tour, performances from which a home video entitled Olivia in Concert was produced. The Physical era marked the height of Newton-John's solo career, gaining her wide acclaim as one of the most successful female artists of the early 1980s.