Brazilians perform capoeira on the first day of Carnival celebrations on February 16, 2012 in Salvador, Brazil. Rio de Janiero's Carnival begins tomorrow. (Photo by Mario Tama/Getty Images)
A general view of the Burj Khalifa on February 23, 2012 in Dubai, United Arab Emirates. At 829.84 m (2723 ft) tall the Burj Khalifa is currently the tallest building in the world. (Photo by Chris Jackson/Getty Images)
Jimmy Fallon and Madonna sign the Facebook wall before their livestream interview at the Facebook offices on March 24, 2012 in New York City. (Photo by Dimitrios Kambouris/Getty Images)
New Zealand Paralympic swimmer Cameron Leslie poses for portrait at the Millennium Pool on March 26, 2012 in Auckland, New Zealand. (Photo by Hannah Johnston/Getty Images)
Katy Perry attends the European premiere of Katy Perry: «Part Of Me 3D» at Empire Leicester Square on July 3, 2012 in London, England. (Photo by Mike Marsland)