Britney is the third studio album by American singer Britney Spears. It was released on October 31, 2001, by Jive Records.

Looking to transition from the teen pop styles of her first two studio albums ...Baby One More Time (1999) and Oops!... I Did It Again (2000), Spears began to embrace a significantly more mature sound with Britney. The record incorporates genres of pop and R&B with influences of EDM and occasionally dips into disco, hip hop, rock, and electronica. Its lyrical themes address the subjects such as coming of age, adulthood, control, and sexuality. Contributions to its production came from a variety of collaborators, including Max Martin and Rami Yacoub. Spears herself assumed a more prominent role in the album's development, co-writing six of its tracks.

Britney received generally mixed reviews from music critics, who complimented Spears' musical progression but criticized her increasingly provocative image. Regardless, the album was a global commercial success and debuted atop the US Billboard 200 with first-week sales of 746,000 copies, making Spears the first female artist to have her first three studio albums debut atop the chart, a record she would later break with her fourth studio album In the Zone (2003). The album received a nomination for Best Pop Vocal Album at the 45th Annual Grammy Awards (2003). With worldwide sales of over ten million copies, Britney is one of the best-selling albums of the 21st century.

Britney produced six singles. "I'm a Slave 4 U" reached the top ten in 20 countries but peaked only at number 27 on the US Billboard Hot 100, becoming Spears's first lead single not to peak within the top ten. "Overprotected" also achieved international commercial success but peaked only at number 86 the US Billboard Hot 100. "I'm Not a Girl, Not Yet a Woman", "I Love Rock 'n' Roll" and "Boys" reached the top ten in several countries but all failed to enter the US Billboard Hot 100, while "Anticipating" was released exclusively in France instead of "I Love Rock 'n' Roll". To further promote the album, Spears embarked on her fourth concert tour, titled Dream Within a Dream Tour, from November 2001 until July 2002.