President Barack Obama, first lady Michelle Obama and their daughters Sasha and Malia, sing during the annual National Christmas Tree Lighting on the Ellipse, Thursday, Dec. 6, 2012, in Washington. This year's giant blue spruce is new, transplanted in October on the Ellipse, south of the White House. (AP Photo/Carolyn Kaster)
Pres. Obama lights up National Christmas tree
U.S. President Obama, first lady and their daughters Malia and Sasha participated in lighting the National Christmas tree in front of White House in Washington on Dec. 6.