Producer: Camilo Lara - Artist: Mexican Institute Of Sound - Mixer: Franklin 'El Medico' Rodriguez - Featuring: La Perla - Recording Engineer: Diego Aguirre Cruzaley - Featuring: Gera MX - Vocal Engineer: Daniel Michel - Featuring: Metallica - Vocal Engineer: Jayrick - Vocals: James Hetfield - Vocals: La Perla - Vocals: Gera MX - Programming: Camilo Lara - Trumpet: Alejandro Gonzalez - Percussion: Chrtmn - Mastering Engineer: Frank Arkwright