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Leona Lewis performs during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453599823 )

The Rockefeller Center angels are seen during the 81st annual Christmas Tree lighting ceremony in New York, New York, USA, 04 December 2013. 45,000 energy efficient LED lights we're installed on the 76-foot--tall tree, plus other decorations. The Rockefeller Center Christmas tree is a New York institution and was started in 1933. EPA/JASON SZENES ( USA ROCKEFELLER CENTER CHRISTMAS TREE )

US Singer Jewel performs before the 81st annual lighting of the Rockefeller Center Christmas tree in New York, New York, USA, 04 December 2013. 45,000 energy efficient LED lights we're installed on the 76-foot--tall tree, plus other decorations. The Rockefeller Center Christmas tree is a New York institution and was started in 1933. EPA/JASON SZENES ( USA ROCKEFELLER CENTER CHRISTMAS TREE )

General Atmosphere during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453639655 )

Members of the musical "Rockettes" perform during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453639643 )

Robby Takac and John Rzeznik of the Goo Goo Dolls perform during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453600163 )

Mary J. Blige performs during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453645227 )

People look out a fifth-story window at the Swarovski star atop the Rockefeller Center Christmas tree after it was lit during a ceremony, Wednesday, Dec. 4, 2013, in New York. Some 45,000 energy efficient LED lights adorn the 76-foot tree. (AP Photo/Kathy Willens) ( APTOPIX Rockefeller Tree Lighting )

The Radio City Rockettes perform during the 81st annual Rockefeller Center Christmas tree lighting ceremony on Wednesday, Dec. 4, 2013 in New York. (Photo by Evan Agostini/Invision/AP) ( 2013 Rockefeller Center Christmas Tree Lighting Ceremony )

The Christmas Tree is lit during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453620759 )

Jewel performs during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453608429 )

Angels made of wire and light frame the Rockefeller Center Christmas tree after it was lit during a ceremony, Wednesday, Dec. 4, 2013, in New York. Some 45,000 energy efficient LED lights adorn the 76-foot tree. (AP Photo/Kathy Willens) ( Rockefeller Tree Lighting )

Lauren Alaina performs during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453639225 )

British singer and song writer Leona Lewis (C) performs before the 81st annual lighting of the Rockefeller Center Christmas tree in New York, New York, USA, 04 December 2013. 45,000 energy efficient LED lights we're installed on the 76-foot--tall tree, plus other decorations. The Rockefeller Center Christmas tree is a New York institution and was started in 1933. EPA/JASON SZENES ( USA ROCKEFELLER CENTER CHRISTMAS TREE )

Jewel performs during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453600455 )

The Radio City Rockettes perform before the 81st annual lighting of the Rockefeller Center Christmas tree in New York, New York, USA, 04 December 2013. 45,000 energy efficient LED lights we're installed on the 76-foot--tall tree, plus other decorations. The Rockefeller Center Christmas tree is a New York institution and was started in 1933. EPA/JASON SZENES ( USA ROCKEFELLER CENTER CHRISTMAS TREE )

epa03976994 The Rockefeller Center Christmas tree stands lit during the 81st annual lighting ceremony in New York, New York, USA, 04 December 2013. 45,000 energy efficient LED lights we're installed on the 76-foot--tall tree, plus other decorations. The Rockefeller Center Christmas tree is a New York institution and was started in 1933. EPA/JASON SZENES ( USA ROCKEFELLER CENTER CHRISTMAS TREE )

The Rockefeller Center Christmas tree is seen reflected in a marble bust of John D. Rockefeller during the 81st annual lighting ceremony in New York, New York, USA, 04 December 2013. 45,000 energy efficient LED lights we're installed on the 76-foot--tall tree, plus other decorations. The Rockefeller Center Christmas tree is a New York institution and was started in 1933. EPA/JASON SZENES ( USA ROCKEFELLER CENTER CHRISTMAS TREE )

From left, Journalist Natalie Morales, Journalist Savannah Guthrie, TV Personality Al Roker and Journalist Matt Lauer arrive during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453599279 )

Miss. Universe Gabriela Isler arrives during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453638973 )

Jewel arrives during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453631627 )

Robby Takac, left, and John Rzeznik of the Goo Goo Dolls arrives during 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453591973 )

Singer Lauren Alaina attends the 81st annual Rockefeller Center Christmas tree lighting ceremony on Wednesday, Dec. 4, 2013 in New York. (Photo by Evan Agostini/Invision/AP) ( 2013 Rockefeller Center Christmas Tree Lighting Ceremony )

The tree is waiting to be lit prior to 81st Annual Rockefeller Center Christmas Tree Lighting Ceremony at Rockefeller Center on December 4, 2013 in New York City. (Photo by Stephen Lovekin/Getty Images) ( 453591747 )

The Rockefeller Center Christmas tree is lit during a ceremony, Wednesday, Dec. 4, 2013, in New York, in this view in which the lens was zoomed during the exposure. Some 45,000 energy efficient LED lights adorn the 76-foot tree. (AP Photo/Kathy Willens) ( APTOPIX Rockefeller Tree Lighting )