Gian Franco Reverberi is an Italian

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 composer

Composer

A composer is a person who creates music, either by musical notation or oral tradition, for interpretation and performance, or through direct manipulation of sonic material through electronic media...

 and musician. He worked mainly on the soundtracks for Spaghetti Westerns.

He was one of the first Italian rock music

Rock music

Rock music is a genre of popular music that developed during and after the 1960s, particularly in the United Kingdom and the United States. It has its roots in 1940s and 1950s rock and roll, itself heavily influenced by rhythm and blues and country music...

 artists.
He also worked with his brother Gian Piero Reverberi

Gian Piero Reverberi

Gian Piero Reverberi is an Italian pianist, composer, arranger, conductor, and entrepreneur.After obtaining Diplomas in piano and composition from the Paganini Conservatory in Genoa, Reverberi worked in a wide range of media, including TV themes, spaghetti Western soundtracks to pop and rock...

 on the song "Last Man Standing" (or "Nel Cimitero di Tucson") from the soundtrack of Django, Prepare a Coffin (Preparati la bara!) (one of many inofficial sequels to Django

Django (film)

Django is a 1966 Italian spaghetti Western film directed by Sergio Corbucci and starring Franco Nero in the eponymous role. The film earned a reputation as being one of the most violent films ever made up to that point and was subsequently refused a certificate in Britain until 1993, when it was...

), which forms the basis of Gnarls Barkley

Gnarls Barkley

Gnarls Barkley is an American soul duo comprising Danger Mouse and Cee Lo Green. Their first studio album St. Elsewhere was released in 2006; along with its first single "Crazy". Both single and album were a major commercial success and have been noted for their large sales by download...

's hit "Crazy

Crazy (Gnarls Barkley song)

"Crazy" is the debut single from Gnarls Barkley, a musical collaboration between Danger Mouse and Cee Lo Green, and is taken from their 2006 debut album St. Elsewhere...

".