Rockefeller Christmas tree lights up

Spectators enjoy the celebration during 81st annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center in New York City, Dec. 4, 2013.

Mariah Carey

Mariah Carey rehearses for "Christmas in Rockefeller Center."

New York

The Rockefeller Center Christmas tree shines in New York, Dec. 4, 2013. Some 45,000 energy efficient LED lights adorn the 76-foot tree.

Mary J. Blige

Mary J. Blige performs during 81st annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center, Dec. 4, 2013.

Kelly Clarkson

Kelly Clarkson rehearses for "Christmas in Rockefeller Center."

The Goo Goo Dolls

The Goo Goo Dolls perform before the Rockefeller Center Christmas Tree is lit, Dec. 4, 2013.

The Rockettes

The Radio City Music Hall Rockettes perform before the Rockefeller Center Christmas Tree is lit, Dec. 4, 2013.

John Rzeznik

John Rzeznik and the Goo Goo Dolls perform during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony, Dec. 4, 2013.

New York

General atmosphere during the 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center, Dec. 4, 2013.

Ashanti

Ashanti rehearses for "Christmas in Rockefeller Center."

New York

General atmosphere during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center, Dec. 4, 2013.

Gabriela Isler

Miss. Universe Gabriela Isler arrives during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center, Dec. 4, 2013.

Jewel

Jewel performs before the Rockefeller Center Christmas Tree is lit, Dec. 4, 2013.

New York

Spectators enjoy the celebration during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center, Dec. 4, 2013.

Leona Lewis

Leona Lewis performs during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center, Dec. 4, 2013.

Rockettes

Members of the musical "Rockettes" perform during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony, Dec. 4, 2013.

New York

The Swarovski star shines atop the Rockefeller Center Christmas tree after it was lit during a ceremony, Dec. 4, 2013.

Lauren Alaina

Lauren Alaina performs during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center, Dec. 4, 2013.

New York

Spectators gather to watch the 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony, Dec. 4, 2013.

Jewel

Jewel performs during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony, Dec. 4, 2013.

New York

General atmosphere during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony, Dec. 4, 2013.

NBC's Today

Television news hosts Natalie Morales, Savannah Guthrie, Al Roker and Matt Lauer arrive during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony, Dec. 4, 2013.

New York

Spectators enjoy the celebration during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center, Dec. 4, 2013.

Jewel

Jewel performs before the Rockefeller Center Christmas tree lighting, Dec. 4, 2013.

Mary J. Blige

Mary J. Blige performs during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center, Dec. 4, 2013.

New York

Spectators enjoy the celebration during the 81st annual Rockefeller Center Christmas Tree Lighting Ceremony, Dec. 4, 2013.

John Rzeznik

John Rzeznik, lead singer of the Goo Goo Dolls, sings before the lighting of the Rockefeller Center Christmas tree, Dec. 4, 2013.

New York

A young woman stands at a podium that was used to light the Rockefeller Center Christmas tree as others take photographs of the tree, Dec. 4, 2013.

The Rockettes

The Rockettes perform before the lighting of the Rockefeller Center Christmas tree, Dec. 4, 2013.

New York

The Rockefeller Center Christmas tree is shown surrounded by angels in a view from the Channel Gardens, Dec. 4, 2013, in New York. Some 45,000 energy efficient LED lights adorn the 76-foot tree.