Completely cosmopolitan with international grooves to spare, Heatwave emerged as one of the disco era's funkiest dance groups. American serviceman brothers Johnnie Wilder and his brother Keith Wilder were based in Germany when they first began performing, and upon their discharge from the Army, the duo stayed in that country. Both singers, the pair gigged in clubs and bars with an assortment of bands while still enlisted. However, they were constantly looking to expand their horizons, and in mid-year they relocated to the U.K. to link up with songwriter/keyboardist Rod Temperton.