Premise

Kelly Clarkson, Dick Van Dyke, Renée Fleming, George Lopez, Lionel Richie and host Ty Burrell celebrate the nation's 234th birthday, joined by Broadway's Laura Michelle Kelly and Gavin Lee ("Mary Poppins") and Montego Glover ("Memphis"), President and Mrs. Obama, the U.S. Army Field Band's Soldiers' Chorus, Robin Roberts and former secretary of state Colin Powell, who salutes five U.S. Medal of Honor winners. Taped June 6, 2010.