For Boyd, Harrison wrote “Something,” the Fab Four’s second most-covered hit and called “the greatest love song of the twentieth century” by Beatlephobe Frank Sinatra. Clapton’s passion for his friend’s wife inspired the scorching “Layla.” “I just knew — knew, knew! — it was about me,” Boyd recalled of the moment she first heard “Layla.” Later, when Boyd had left Harrison and married Clapton, he serenaded her with “Wonderful Tonight.”