Cover photographs, left to right: Ray Charles (UPI/Corbis-Bettmann); Jascha Heifetz (Corbis-Bettmann); The Ramones (Denis O’Regan/Corbis); Caruso (Library of Congress/Corbis); Nigerian musicians (Hulton-Deutsch Collection/Corbis); Louis Armstrong (Corbis-Bettmann); Frank Sinatra and Bing Crosby (UPI/Corbis-Bettmann); Leonard Bernstein (Library of Congress/Corbis); Jive dancers (Hulton-Deutsch Collection/Corbis); Bob Wills (UPI/Corbis-Bettmann); Michael Jackson (Corbis-Bettmann-Reuter); Bill Haley and His Comets (UPI/Corbis-Bettmann); The Miracles (Hulton Getty Picture Library); Maria Callas (Hulton-Deutsch Collection/Corbis).