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First lady Michelle Obama dances with students at Alice Deal Middle School in northwest Washington, Tuesday, May 3, 2011, during a surprise visit for the school's Let's Move! event.

(AP Photo/Manuel Balce Ceneta)

First Lady Michelle Obama

As the First Lady of the United States, Michelle Obama has become an advocate for healthy eating, veterans and military families, poverty awareness and women's rights. She has also become a fashion icon and has been named by Forbes Magazine as the eighth most powerful woman in the world.