It was followed by Oops!... I Did It Again in May 2000, which debuted atop the US Billboard 200 and registered the highest first-week sales for a female artist at the time, selling 1,319,000 copies in its first week. Both albums were eventually certified diamond by the Recording Industry Association of America (RIAA) and became two of the best-selling albums of all time. Spears' subsequent studio albums Britney (2001) and In the Zone (2003) both debuted atop the US Billboard 200, albeit selling slower than their predecessors. Regardless, both received multi-platinum certifications from the RIAA, and made Spears the second female artist after Janet Jackson to have four consecutive US number-one albums. The latter produced "Toxic", Spears' most commercially-successful single since "Oops!... I Did It Again" (2000); it won Spears her first Grammy Award, for Best Dance Recording in 2005. The Onyx Hotel Tour, on which Spears embarked in support of In the Zone, was abruptly cancelled in June 2004, following Spears' knee injury while filming the accompanying music video for "Outrageous", the final single from In the Zone. During the tour, Spears had recorded two new songs, which would appear on Greatest Hits: My Prerogative, and began a relationship with American dancer Kevin Federline. The couple became engaged in July and got married on September 18. Within that period, Spears embarked on a prolonged hiatus from performing, both due to the injury and to start a family; she wouldn't release another studio album until Blackout (2007). Retrospectively, Stephen Thomas Erlewine from AllMusic noted that Spears "hadn't been out of the pop culture headlines since she released her debut album, ...Baby One More Time, in January 1999. In the nearly six years separating that debut album and the release of Greatest Hits in November 2004, Britney was omnipresent, representing both the entire teen pop phenomenon of the turn of the millennium, plus the teasing, Maxim-fueled sexuality of the time". New material Greatest Hits: My Prerogative included three previously unreleased tracks–"My Prerogative", "I've Just Begun (Having My Fun)" and "Do Somethin'"–all of which were produced by Bloodshy & Avant. "My Prerogative" is a cover of Bobby Brown's 1988 song of the same title, with the original version's lyrics altered to fit a woman's perspective: "They say I'm nasty, but I don't give a damn / Getting boys is how I live / Some ask me questions, why am I so real?