Today before her highly-anticipated show at the Pepsi Center, Michelle Obama surprised a group of patients at Children's Hospital Colorado.

Obama fielded quite a few questions from the kids, including whether or not she was running for president. She politely declined and let them know she'd rather see someone younger attempt to that particular leadership role.

Reese Witherspoon is expected to make an appearance at Obama's event this evening at The Pepsi Center, adding to the lineup of star-studded hosts that will be present at her events across the country.

She is currently promoting her new book 'Becoming', which focuses on her roots, her upbringing, her husband's presidency, and more.

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