Obama's swearing-in ceremony on January 21 is expected to draw up to 800,000 people, less than half of the 1.8 million who flocked to Washington in 2009 to celebrate the United States' first African American president.

That historic event featured 10 official balls. This time around, organizers are planning only two - one for military servicemembers and one for the general public. Organizers also plan a children's concert for the Saturday before the event.

Organizers did not say who would perform at which event.

The inauguration committee previously announced performers for the swearing-in ceremony. R&B star Beyoncé Knowles will sing the national anthem, while country singer Kelly Clarkson is scheduled to give a rendition of "My Country, 'Tis of Thee." Singer-songwriter James Taylor will perform "America the Beautiful."

It will be Beyoncé's third inauguration performance. Four years ago, she serenaded the first couple with Etta James' "At Last" at an inaugural ball, and in 2001 she performed at the children's concert with her band, Destiny's Child.