A Polish flag is stuck into the snow at the site of a plane crash that killed former Poland's President Lech Kaczynski and 95 others near the Russian city of Smolensk, April 10, 2011. A diplomatic row has erupted over a plaque marking last year's plane crash in Russia that killed Poland's president and 95 others, casting a shadow over Sunday's commemoration of disaster's first anniversary. [Photo/Agencies]

Colombian pop star Shakira performs during her concert at National stadium in San Jose April 10, 2011. Shakira's concert was part of the various activities organized for the inauguration of the new national stadium donated by the Government of China. [Photo/Agencies]