Rockefeller Center Christmas Tree 2011

The 74-foot-tall Rockefeller Center Christmas Tree is lit using 30,000 energy efficient LED lights in the 79th annual lighting ceremony, on Nov. 30, 2011, in New York.

The evening saw performances by Neil Diamond, Michael Buble, Cee Lo Green, Carole King, Katherine McPhee, Justin Bieber, Tony Bennett and more.

The Rockefeller Center Christmas Tree is lit Nov. 30, 2011, in New York. Tens of thousands of people came out for the annual event.

Neil Diamond performs at the Rockefeller Center Christmas Tree Lighting ceremony in New York, on Nov. 30, 2011.

Carole King performs at the Rockefeller Center Christmas Tree Lighting event in New York, on Nov. 30, 2011.

Justin Bieber appeared at New York's annual Rockefeller Center Christmas tree lighting in a pre-taped performance on Nov. 30, 2011.

Canadian crooner Michael Buble helped ring in the holiday season at the Rockefeller Christmas Tree Lighting ceremony in New York on Nov. 30, 2011.

Katherine McPhee of "American Idol" fame sang at the Rockefeller Christmas Tree Lighting on Nov. 30, 2011, in New York.

Cee Lo Green performs at the Rockefeller Christmas Tree Lighting ceremony on Nov. 30, 2011.

Carole King performs at the Rockefeller Center Christmas Tree Lighting in New York, on Nov. 30, 2011.

Cee Lo Green performs at the 2011 Rockefeller Center Christmas Tree Lighting on Nov. 30, 2011, in New York.

The Rockefeller Center Christmas Tree is lit Nov. 30, 2011, in New York. Tens of thousands of people came out for the annual event.

Singer Michael Buble performs at the Rockefeller Center Christmas Tree Lighting Party at Rock Center Cafe on Nov. 30, 2011, in New York.

The 74-foot-tall Rockefeller Center Christmas Tree is shown after it was lit using 30,000 energy efficient LED lights in the 79th annual lighting ceremony, Nov. 30, 2011, in New York.

Pedestrians pass the Rockefeller Center Christmas Tree after it was lit, Nov. 30, 2011, in New York.

The Rockefeller Center Christmas tree was lit on Nov. 30, 2011, in New York. The first official Rockefeller Center tree lighting ceremony took place in 1933.

The Rockefeller Center Christmas tree was illuminated with five miles of lights on Nov. 30, 2011, in New York.

The Rockefeller Center Christmas tree was lit on Nov. 30, 2011, in New York.

"The Voice" winner Javier Colon performs at the 2011 Rockefeller Center Christmas Tree Llighting ceremony on Nov. 30, 2011, in New York.

The 74-foot-tall Rockefeller Center Christmas Tree is lit using 30,000 energy efficient LED lights in the 79th annual lighting ceremony, on Nov. 30, 2011, in New York.

Actress Mariska Hargitay attends the Rockefeller Center Christmas Tree Lighting Party at Rock Center Cafe on Nov. 30, 2011, in New York.

Actor Judah Friedlander of "30 Rock" attends the Rockefeller Center Christmas Tree Lighting Party at Rock Center Cafe on Nov. 30, 2011, in New York.

Katharine McPhee attends the 2011 Rockefeller Center Christmas Tree Lighting on Nov. 30, 2011, in New York.

"Law & Order: SVU" actress Kelli Giddish attends the Rockefeller Center Christmas Tree Lighting Party at Rock Center Cafe on Nov. 30, 2011, in New York.

Actor Grizz Chapman from "30 Rock" attends the Rockefeller Center Christmas Tree Lighting Party at Rock Center Cafe on Nov. 30, 2011, in New York.

Donald Trump poses with Michael Jack, president and general manager of WNBC 4 New York, at the Rockefeller Center Christmas Tree Lighting Party on Nov. 30, 2011, in New York.

Actors Sue Galloway and John Lutz of "30 Rock" attend the Rockefeller Center Christmas Tree Lighting Party at Rock Center Cafe on Nov. 30, 2011, in New York.