"Por una Cabeza" is one of the most famous tangos ever written, composed by Carlos Gardel with lyrics by Alfredo Le Pera. The title translates to "By a Head" and refers to a horse winning a race by a head length. The music embodies the dramatic passion of Argentine tango and has been featured in numerous films including "Scent of a Woman," "True Lies," and "Schindler's List."