Obama's Big Bash: The Stars Celebrate!

Demi, Tobey, Marc & J.Lo and more kick off the night's festivities at 10 Inaugural Balls!

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EXTREME MAKEOVER

Also showing his commitment to service: Usher, who pitched in to make over the library at Simon Elementary School on Monday. The R&B singer teamed with MTV and ServiceNation for the "Be the Change: Live from the Inaugural" event, where he led a group of students in the project.