Washington D.C. (Gallery) Beyonce Knowles [1p.3n]Beyonce Knowles:Acting:Washington D.C. [1p.2n]Beyonce Knowles:Grammy Awards [1p.1n]Beyonce Knowles:MTV Video Music Awards [1p.4n]Beyonce Knowles:Golden Globe Awards [1p.1n] p1   p1   p1   Beyonce sings for U.S. President Barack Obama and first lady Michelle during their first dance of the evening at the Neighborhood Inaugural Ball in Washington January 20, 2009 click to open Beyonce sings for U.S. President Barack Obama and first lady Michelle during their first dance of the evening at the Neighborhood Inaugural Ball in Washington January 20, 2009 click to open   p1   p1   p1