Photo SpecialObama's Big Bash: The Stars Celebrate!
Demi, Tobey, Marc & J.Lo and more kick off the night's festivities at 10 Inaugural Balls!
More from PEOPLE
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.
