Unorthodox Jukebox became an international success , reaching number one in the US , Australia , Canada , Switzerland , and the UK , also selling six million copies worldwide .
Mars ' second album , Unorthodox Jukebox , was released in December 2012 .
Unorthodox Jukebox   became an international success , reaching number one in the US , Australia , Canada , Switzerland , and the UK , also selling six million copies worldwide .
Mars ' second album , Unorthodox Jukebox , was released in December 2012 .