Britney Spears

Update Monday December 28, 2009 01:00 AM EST Originally posted Monday December 28, 2009 01:00 AM EST

Since her debut on the New Mickey Mouse Club 16 years ago, Spears has become a worldwide phenomenon, surviving her share of high-profile struggles. Now, after successfully completing her first tour in five years, the 28-year-old is embracing being a mom to the two sons she shares with ex-husband Kevin Federline. As for what 2010 will bring? "I'm taking it one day at a time," she says.

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