Monday, December 23, 2013 9:26am ET by  
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Britney Spears says on-stage persona is like the result of "bipolar disorder"

Britney Spears believes the switch from her normal character into her on-stage persona is like "bipolar disorder".

The singer has indulged in her naughty side on many occasions in her career, with her Madonna kiss and her S&M themed 'Work Bitch' video two particular highlights.

However, she revealed in new E! documentary I Am Britney Jean that she is completely different off stage.

In fact, Spears said that it is almost like a case of "bipolar disorder". She revealed: 'It's almost like it's my alter ego when I get on stage. I turn into this different person, seriously. Bipolar disorder."

The singer meanwhile said in the same interview that she feels she is almost too shy to take part in the music industry.

 

 

 

 

 

Watch the documentary below: