We Are One: The Obama Inaugural Celebration at the Lincoln Memorial was a live event held at the Lincoln Memorial on January 18, 2009. 400,000 people gathered on the Mall in Washington, D.C. for a concert and series of speeches from a number of celebrities to celebrate the inauguration of Barack Obama as President of the United States two days later. Before the concert began, and during breaks, large monitors were used to excite the audience. In a video shot for the occasion, Elmo and a Muppet number 1 led the audience in a chant: "We are one!"