Show of fireworks at the opening of the large traditional Christmas tree in the city of Sao Paulo. The structure is almost 60 feet tall and has more than 500 lamps and 264 000 stroble micro-LED lamps on December 9, 2012 in Sao Paulo, Brazil. (Photo by Levi Bianco/News Free/LatinContent/Getty Images)
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A Christmas tree stands illuminated in front of the Coliseum on December 9, 2012 in Rome, Italy. (Photo by Giorgio Cosulich/Getty Images)
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A Christmas tree is lit up to celebrate the upcoming Christmas holiday in front of City Hall in Seoul, South Korea, Wednesday, Dec. 5, 2012. (AP Photo/Lee Jin-man)
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An abstract light installation replaces the traditional Christmas tree at the Grand Place in Brussels, Saturday Dec. 1, 2012. Traditionally, a 20m (65ft) pine tree from the forests of the Ardennes decorates the city's central square, the Grand Place. This year, it has been replaced with a 25m (82ft) construction. (AP Photo/Geert Vanden Wijngaert)
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The Rockefeller Center Christmas Tree is lit during the 80th annual tree lighting ceremony at Rockefeller Center in New York, Wednesday, Nov. 28, 2012. (AP Photo/Kathy Willens)
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People enjoy the Christmas illuminations at the Royal Treaty street in Warsaw, Poland, Saturday, Dec. 1, 2012. (AP Photo/Czarek Sokolowski)
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The Holiday Tree is seen at the 5th annual Holiday Tree Lighting at L.A. Live and opening of LA Kings Holiday Ice on Wednesday, Nov. 28, 2012, in Los Angeles. (Photo by Matt Sayles/Invision for AEG/AP Images)
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A Christmas tree is displayed at a shopping mall as the territory prepares to celebrate the Christmas holidays, in Hong Kong Monday, Nov. 26, 2012. (AP Photo/Vincent Yu)
Cities around the world turn on their Christmas trees lights.