U.S. President Barack Obama (bottom row R) and first lady Michelle Obama (bottom row 2nd R) applaud on the balcony as they attend the 2012 Kennedy Center Honors at the Kennedy Center in Washington, December 2, 2012. Also pictured are honorees (bottom row L-R) Led Zeppelin band mates John Paul Jones, Robert Plant and Jimmy Page, late-night TV host David Letterman, blues musician George "Buddy" Guy, ballerina Natalia Makarova and actor Dustin Hoffman. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS ENTERTAINMENT)