For most listeners, Por Una Cabeza is THE iconic tango. It has been used in at least eight movies, including Scent of a Woman, Schindler’s List, and Titanic. It was written in 1935 by Carlos Gardel and Alfredo Le Pera, both of whom died tragically in a plane crash later that same year. The song is the lament of a man who lost all his money betting on a horse race (por una cabeza means “by a head,” the amount his horse lost by), and also lost the woman he loves.