Demi, Tobey, Marc & J.Lo and more kick off the night's festivities at 10 Inaugural Balls!
Credit: Matt Rourke/AP
Updated: Wednesday Jan 21, 2009 | 12:00 PM EST
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Father-daughter duo Billy Ray and Miley Cyrus also did their part, performing at the kids' show – where Sasha and Malia Obama had a front-seat view
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