To celebrate the comeback of Britney Spears and the release of her documentary, 'Britney Spears: For The Record' (out on June 1) we have five copies to give away. More after the jump...

Britney's first ever official documentary (you may have seen on Sky 1) is now out on DVD. And here's what the press release has to say:

The documentary film BRITNEY: FOR THE RECORD gives a unique insight into the career and private life of one of the most controversial and successful female artists of all time. Granted unprecedented access during a three-month shoot as Britney was recording and promoting her sixth studio album, "Circus", one interviewer and his film crew managed to capture the real Britney Spears on film. With no topic off limits, Britney candidly shares her thoughts on the events of the last several years and the media circus her life became at the end of 2007.

To be in with your chance of winning, just answer this easy question.

What was the name of Britney's first number one single?

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