BRITNEY Spears embarked her Circus would tour to prove to the world that she wasnt finished. The singer - who suffered a highly-publicized breakdown in 2008 - says she was keen to hit the road to prove her critics wrong. A lot of people thought I wouldnt make it. People thought I was finished, didnt they? she said. I guess for a while last year it looked that way. Nothing I can do about the past. But Im hoping to prove them wrong now. And I have really put everything I have into this new show. Im not sad any more, added the Toxic hitmaker. I was just so sad for such a long time, but not any more. And you know what? That feels really, really good. Im happy. Truly. SS I feel like the girl who has it all. I have my family, my boys, my friends, my fans, this show. Sources close to Spears recently denied claims the singer is getting married. - SS