Performers for the holiday celebration will include Diana Ross, "Smash" star Megan Hilty, chart-topping recording star Demi Lovato, "The Voice" favorite Chris Mann and "American Idol" winner Scotty McCreery.

The evening will conclude with a special performance by "Gangnam Style" sensation PSY.

Celebrating its 31st anniversary this year, "Christmas in Washington" is a holiday tradition benefiting the Children’s National Medical Center. The concert is attended each year by the President and First Lady, as well as many other Washington VIPs.