Since the mid-1960s, Edda Dell'Orso has provided haunting wordless vocals to a large number of film scores by Ennio Morricone and other prominent, mostly Italian composers of those times; Piero Piccioni, Bruno Nicolai, Roberto Pregadio and Luis Bacalov. But her name is synonymous with Morricone and in particular, the soundtracks of the original spaghetti westerns of Sergio Leone, such as "A Fistful of Dollars", "The Good, The Bad, and The Ugly" and "Once Upon A Time In The West"