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

U.S. President Barack Obama delivers remarks during the 90th lighting of the National Christmas tree in front of the White House in Washington, December 6, 2012.

Lights illuminate a 32-meter Christmas tree, a fir from the Abreschviller forest in the Alsace region, which is installed for the first time for the holiday season on the Place de la Concorde in Paris

A man blows his trumpet from the Old Town Hall Tower as a Christmas tree is illuminated at the Old Town Square in Prague December

The U.S. Capitol Christmas Tree is pictured against a backdrop of the U.S. Capitol Building in Washington, December 4, 2012 during the official lighting ceremony for the tree.

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

Fireworks explode from a Christmas tree during the lighting ceremony at Rodrigo de Freitas Lake in Rio de Janeiro December 1, 2012

Britain's Prime Minister David Cameron and television talent show X Factor finalists and judge Nicole Sherzinger stand with school children after switching on the lights of the 10 Downing Street Christmas tree, in central London

People enjoy the Christmas illuminations at the Royal Treaty street in Warsaw, Poland,

The official White House Christmas Tree festooned with ornaments is shown in the Blue Room at the White House as First lady Michelle Obama welcomed military families for the first viewing of the 2012 holiday decorations in Washington