Barack Obama, Joshua Bell, Mariah Carey, Janelle Monáe, Renee Fleming

From left, Santa, violinist and conductor Joshua Bell, soprano Renee Fleming, President Barack Obama, singer and musician Janelle Monáe, and singer and songwriter Mariah Carey holding her daughter Monroe, dance with a young dancer and the end of the 2013 National Christmas Tree Lighting ceremony at the Ellipse near the White House in Washington, Friday, Dec. 6, 2013. (AP Photo/Carolyn Kaster)