Prince was born in Minneapolis and developed an interest in music as a young child, writing his first song when he was seven years old. After recording songs with his cousin's band 94 East, 19-year-old Prince recorded several unsuccessful demo tapes before releasing his debut album For You in 1978, under the guidance of manager Owen Husney. His 1979 album Prince went platinum due to the success of the singles "Why You Wanna Treat Me So Bad?" and "I Wanna Be Your Lover". His next three records—Dirty Mind (1980), Controversy (1981), and 1999 (1982)—continued his success, showcasing Prince's trademark of prominently sexual lyrics and incorporation of elements of funk, dance, and rock music. In 1984, he began referring to his backup band as The Revolution and released Purple Rain, which served as the soundtrack to his film debut of the same name. A prolific songwriter, Prince in the 1980s wrote songs for and produced work by many other acts, often under pseudonyms.