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Spears released her fourth studio album In the Zone in November 2003, jettisoning the Max Martin-produced Alexandra Neldel fakes synthpop of her earlier releases. The album took in lesser-known producers such as RedZone and big names including Moby and R. Kelly. Spears co-wrote eight of the album's thirteen songs and co-produced several pieces of her material for the first time. 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.^[65] The album had a mixed reception from critics. Stylus Magazine gave the album a D and blamed Spears's career choices by stating, "Ultimately, In the Zone suffers greatly from Britney's uneasy transition from teen tart to sexually powerful woman. Had Britney been in charge of her career direction instead of mercilessly prostituted by her management, she might have been able to produce something with some semblance of musical vision."^[66] The Guardian praised the album's melodies and her effort, giving it 4 out of 5 stars: "Unlike previous Britney albums, In the Zone has no filler and no shoddy cover versions, just 57 varieties of blue-chip hit-factory pop. There is southern hip-hop, deep house, Neptunes-style R&B, the ubiquitous Diwali beat and, most importantly, oodles of Madonna."^[67] The album spawned the hit single "Toxic", winning Spears her first ever Grammy in the category of Best Dance Recording.^[68]

Spears released her third studio album Britney in November 2001. In the album, she assumed some creative control by co-writing five tracks. Britney was also know as the album that Spears combined her originated pop sensibilities with more hip hop and R&B beats. Although not as successful as her previous albums,^[37] Britney debuted at number one in the U.S. by selling 745,744 units during its first week.^[43] The album's success made her the only female artist in music history to have her first three albums debut at number one.^[44][45] The album fared well with critics such as Allmusic who gave it 4.5 out of 5 stars, describing the album's title tracks as being "pivotal moments on Britney Spears's third album, the record where she strives to deepen her persona, making it more adult while still recognizably Britney."^[46] In contrast, Rolling Stone said of the album Britney "belabors the obvious: Spears is one month away from entering her twenties and clearly needs to grow up if she's going to bring her fans along."^[47] Britney's lead single "I'm a Slave 4 U" peaked at 27 on the Billboard Hot 100 making it the album's biggest hit.^[48] To help promote the album, Spears embarked on the Dream Within a Dream Tour in November 2001. The tour was forced to cut short in Mexico City due to bad weather.^[49] videos porno de briney spear With the end to her tour, Spears announced she would take a six month break from her career.^[50]