US First Lady Michelle Obama, daughters Sasha and Malia Obama and US President Barack Obama sing Santa Clause is Coming to Town during the 90th annual National Christmas Tree Lighting on the Ellipse of the National Mall December 6, 2012 in Washington, DC. Obama and others attended the event which included entertainment before the lighting of the National Christmas Tree. Photo: BRENDAN SMIALOWSKI, AFP/Getty Images / 2012 Brendan Smialowski
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