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Mariah Carey performs onstage during TNT's 'Christmas in Washington 2010' at the National Building Museum on December 12, 2010 in Washington, DC. 'Christmas in Washington 2010' airs on TNT December 17 at 8pm. 20792_004_0948.JPG
The star singer performed in Washington on Sunday night as part of TNT's "Christmas in Washington" concert.