The stars of TNT's "Christmas In Washington" gathered for a festive evening of holiday songs in the Nation's Capital, capping the evening when joined on-stage by President George W. Bush and First Lady Laura Bush for an ensemble rendition of "Hark the Herald Angels Sing." The holiday concert, taped at the National Building Museum, premieres on TNT on Sun., Dec. 16, at 8 p.m. ET/PT. (L to R) Charlotte Church, Tony Bennett, President George Bush, Reba McEntire, First Lady Laura Bush, Usher, Mandy Moore.