One of the World's most famous trees will be lit tonight as part of an NBC special called "Christmas in Rockefeller Center.

This year's tree is a Norway spruce, measuring 74 feet high, 46 feet in diameter and weighing in at 10 tons. Country star Faith Hill was expected to be at the celebration of the lighting of the Christmas tree but has cancelled her performance (see story) However, you can still look for other performers like Justin Bieber, Michael Buble, Cee Lo Green, Carole King, Tony Bennett, and Katherine McPhee.

The specials airs live tonight at 7pm Central on NBC.

Be sure and catch Faith Hill performing Thursday night during the "CMA Country Christmas" which was taped a few weeks ago. The special airs at 8pm Central on ABC.

Check out this sneak peek of Justin Bieber from YouTube: