Black Market Rhythm Co. is an Australian rock band. The group was formed in 2004, in the Gold Coast, Queensland, by singer/guitarist Christopher Ernst, bassist/guitarist Matt Granfield and drummer Wayne Bennett. n 2004, the band released a self titled EP under the name 'Christopher Ernst' which sold 500 copies in under two months of release. The EP was re-issued as the band changed its name to 'Christopher Ernst and Boys Who Like Girls'. 12 months later Jake O'Brien joined the band on trumpet and shortly after the group changed its name again to 'The Black Market Rhythm Co.'.

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