 The mass migration of "Okies" to California also meant their music would follow and thrive, finding an audience in California's Central Valley.Bakersfield country was a reaction to the slickly produced, string orchestra-laden Nashville sound, which was becoming popular in the late 1950s.One of the first groups to make it big on the West Coast was the Maddox Brothers and Rose, who were the first to wear outlandish costumes and make a "show" out of their performances.