Soft rock (or lite rock) is a derivative form of pop rock that originated in the late 1960s in the U.S. region of Southern California and the United Kingdom. The style smoothed over the edges of singer-songwriter and pop rock, relying on simple, melodic songs with big, lush productions. Soft rock was prevalent on the radio throughout the 1970s and eventually metamorphosed into the synthesized music of adult contemporary in the 1980s