U.S. President Barack Obama (L) makes a surprise singing appearance on stage to help celebrate Senator Ted Kennedy's (D-MA) birthday at a musical tribute at the Kennedy Center in Washington, March 8, 2009. Singer James Taylor (R) and opera singer Denyce Graves (2nd R) join him on stage. Reuters Pictures 9 months ago

U.S. President Barack Obama (L) makes a surprise singing appearance on stage to help celebrate Senator Ted Kennedy's (D-MA) birthday at a musical tribute at the Kennedy Center in Washington, March 8, 2009. Singer James Taylor (R) and opera singer Denyce Graves (2nd R) join him on stage.