Pre-Inaugural celebration aired on HBO

Over 500,000 Americans of all colors spread from the statue of Abraham Lincoln down to the Washington Monument for the "We Are One" opening concert on Sunday was a visually striking mosaic of a nation long divided by race and class coming together on the eve of the inauguration of its first African-American president.

The crowd swayed to the sounds of a musical line-up that was just as diverse, ranging from Beyonce, Mary J. Blige and Stevie Wonder, to rocker Bruce Springsteen and country music star Garth Brooks.