The troubled pop princess joined the Mickey Mouse Club in 1993, but hit international stardom with her single 'Hit Me Baby One More Time' in 1998. From then on she has released five albums and is the eighth best selling female artist of all time.

But the pop princess has had her downfall heavily documented in the press with reports suggesting that she was on the verge of a nervous breakdown. She entered rehab in February 2007 to battle her demons - following her split from husband Kevin Federline - before leaving a month later.

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