President Barack Obama and First Lady Michelle Obama attended a total of 10 official inaugural balls on the evening of Inauguration Day, January 20, 2009. The evening of parties began with a serenade of Etta James' "At Last" sung by Beyonce at the Neighborhood Ball.Associated Press: Stars Come Out For Obama's Inaugural Balls (January 20, 2009)

The Youth Ball, featuring Kanye West, Kid Rock and Fall Out Boy, was broadcast by MTV.Associated Press: Stars Come Out For Obama's Inaugural Balls (January 20, 2009)

The first ball of the inaugural evening was the Neighborhood Ball, it aired on ABC. President Barack Obama and First Lady Michelle Obama danced to the Etta Jamas song "At Last" as Beyonce sang. The Obamas then danced with others to Stevie Wonder's "Signed, Sealed, Delivered" sung by Will.i.am, Shakira, Faith Hill, Sting, Alicia Keys, the singer from Maroon 5 and Mariah Carey.

1. Commander-in-Chief's Ball
2. Neighborhood Inaugural Ball
3. Youth Inaugural Ball
4. Obama Home States Inaugural Ball
5. Biden Home States Inaugural Ball
6. Eastern Inaugural Ball
7. Mid-Atlantic Inaugural Ball
8. Midwest Inaugural Ball
9. Southern Inaugural Ball
10. Western Inaugural Ball

10 official inaugural balls were held on the evening of Barack Obama's inauguration. Over half of these took place at the Washington Convention Center. Most of the official balls were based on regions of the country, or particular states (like Obama's home states of Hawaii and Illinois). The president and his wife committed to appearances at all 10 official balls. Los Angeles Times: Inaugural balls not necessarily a blast (January 15, 2009)