Foreigner were flat-out one of the defining bands of the ‘70s and ‘80s. They hit it big right out of the gate with their self-titled debut in 1977, which sold four million copies in the U.S. alone. Throughout their first four albums, Foreigner developed an explosively catchy hard rock sound, stretching their appeal across gender and generational lines. After several years, the band expanded their repertoire to make room for some epically successful monster ballads. With their knack for writing killer hooks, it's no surprise that Foreigner have had no less than 16 hit singles break the Top 40.