Por Una Cabeza is a tango song written in 1935 by Carlos Gardel and Alfredo Le Pera. It has been covered by many artists, the most famous being Julio Iglesias with a version that went to No. 1 on the Billboard charts in 1988. In English, the title is “For a Head”, which refers to the scalp of the victim.
The song was originally written for Carlos Gardel, but he died in 1935 before recording it. An English version with lyrics by Charles Singleton and Eddie Snyder was recorded by Frank Sinatra with Nelson Riddle. This version is included on several compilations including one titled Come Fly With Me (1999), a duet with Carlos Santana. The Carlos Gardel recording is included on the Carlos Gardel album El Tangauta Oficial, which was released by CBS Records in 1991.