Britney released her fourth studio album In the Zone in November 2003.
The album took in lesser-known producers such as RedZone and big names including Moby and R. Kelly.
In the Zone reached number one in the U.S. charts during its debut week, selling over 609,000 copies. This made Spears the first female in the Nielsen SoundScan era to have her first four studio albums to debut at number one.
In the Zone suffers greatly from Britney's uneasy transition from teen tart to sexually powerful woman.