Premise: London Calling is the third studio album by English punk rock band the Clash. It was released as a double album in the United Kingdom on 14 December 1979 by Columbia Records, and in the United States in January 1980 by Epic Records. "London Calling" is an album that incorporates a range of styles, including punk, reggae, rockabilly, ska, New Orleans R&B, pop, lounge jazz, and hard rock.
Hypothesis: Rockabilly was added to London Calling in 1980.