Chingon is a Mexican rock band started by director Robert RodrÃguez to record songs for his 2003 film Once Upon a Time in Mexico. The band features members of the Latin Rock band Del Castillo and RodrÃguez on guitar. Chingon contributed on Mexico and Mariachis, a compilation album to RodrÃguez' Mariachi Trilogy, and released their debut album, Mexican Spaghetti Western, in 2004. Chingon also contributed their song "Malagueña Salerosa" to Quentin Tarantino's Kill Bill Vol.