Obama's big bash: Celeberities flocked to D.C. to pay tribute to the new President in Washington D.C.. A cold but well-dressed Beyoncé and Jay-Z stood in the crowd at the U.S. Capitol building in Washington, D.C., for President Barack Obama’s swearing-in ceremony on Tuesday. Other celebs in attendance included Oprah Winfrey, Diddy, Denzel Washington, and Muhammed Ali to name a few. Check out who watched Barack Obama get sworn in.