Circus is the 6th album by Britney Spears. It consists of dance pop. This hit record was released on November 28, 2008. The album debuted on Billboard 200 near the top; it sold half a million copies during its 1st week and received positive review from critics. The album's lead single was "Womanizer". Other singles released were the title track, "If U Seek Amy", and "Radar."