Produced by Robert John 'Mutt' Lange (famous for recording AC/DCs' Back In Black), 4 meant the definitive mainstream breakthrough for New York based AOR band Foreigner. Featuring the massive hit "Waiting For A Girl Like You", the album turned into a heavy seller. Other tracks, such as "Urgent", "Woman In Black", "Luanne" and "Juke Box Hero" showed the versatile nature of the group. Combining heavy riffing with effective power balladry, Foreigner claimed their stake in Rock and will live on as a Rock staple for many decades to come.