Circus is the sixth studio album por American pop singer Britney Spears. Jive Records, in collaboration with Zomba Label Group and Sony música Entertainment, released it on November 28, 2008. Having moved over 505,000 copies in the United States in its first week, Circus debuted on the Billboard 200 at number one, making it Spears's fifth number-one album. The feat made Spears the only act in Nielsen SoundScan history to have four albums debut with 500,000 o más copies sold.[3]

The first single, "Womanizer", became Spears's first number one single on the Billboard Hot 100 since her debut "...Baby...