Sugarland will ring in the holidays with Mary J. Blige, Neil Diamond, Rob Thomas and Usher, when TNT airs 'Christmas In Washington' on Dec. 20 at 8:00 PM ET.

'Christmas In Washington' is a musical celebration of the holidays to benefit the National Children's Medical Center. The event is attended annually by the President and the First Lady along with other Washington VIPs.

This year marks the 28th presentation of 'Christmas In Washington.' This year, actor/comedian George Lopez will host the special.

Sugarland released 'Gold and Green,' their first holiday CD, in October.