Parigi. EPA/IAN LANGSDON

Melbourne, Australia REUTERS/Loren Elliott

Sydney (Photo by DAVID GRAY / AFP)

Sydney (Photo by DAVID GRAY / AFP)

Sydney. (Photo by DAVID GRAY / AFP)

Sydney EPA/DEAN LEWINS AUSTRALIA AND NEW ZEALAND OUT

Melbourne, Australia. REUTERS/Loren Elliott

Sydney, Australia. EPA/DEAN LEWINS AUSTRALIA AND NEW ZEALAND OUT

Bangkok, Thailandia . REUTERS/Athit Perawongmetha

Bangkok, Thailandia. REUTERS/Athit Perawongmetha

Bangkok, Thailandia. REUTERS/Athit Perawongmetha

Bangkok, Thailandia. REUTERS/Athit Perawongmetha

Mosca, Russia . REUTERS/Tatyana Makeyeva

Mosca. (Photo by Dimitar DILKOFF / AFP)

Mosca . (Photo by Dimitar DILKOFF / AFP)

Rio de Janeiro, Brasile. REUTERS/Ricardo Moraes

Rio de Janeiro, Brasile. REUTERS/Ricardo Moraes

Rio de Janeiro, Brasile. REUTERS/Ricardo Moraes

Rio de Janeiro, Brasile. REUTERS/Ricardo Moraes

Rio de Janeiro, Brasile. REUTERS/Ricardo Moraes

Rio de Janeiro,Brasile. REUTERS/Ricardo Moraes

Rio de Janeiro,Brasile. REUTERS/Ricardo Moraes TPX IMAGES OF THE DAY

Times Square, Manhattan. REUTERS/Hannah Beier

Times Square,Manhattan REUTERS/Hannah Beier

Times Square, Manhattan

Times Square New York. (Photo by Ben Hider/Invision/AP)

Times Square New York. EPA/SARAH YENESEL

Miami. (Eva Marie Uzcategui/AP Images for Paramount Miami Worldcenter)

Chicago . (Tyler LaRiviere/Chicago Sun-Times via AP)

Miami(Eva Marie Uzcategui/AP Images for Paramount Miami Worldcenter)

Miami(Eva Marie Uzcategui/AP Images for Paramount Miami Worldcenter)

Dubai. (Photo by Giuseppe CACACE / AFP)

Dubai REUTERS

Dubai . (Photo by GIUSEPPE CACACE / AFP)

Dubai

Dubai. (Photo by Giuseppe CACACE / AFP)

Dubai. (Photo by Giuseppe CACACE / AFP)

London. EPA/VICKIE FLORES

London . EPA/VICKIE FLORES

London. EPA/VICKIE FLORES

Londra. EPA/VICKIE FLORES

Londra. EPA/VICKIE FLORES

Taipei, Taiwan. (AP Photo/Chiang Ying-ying)

Taipei, Taiwan. (AP Photo/Chiang Ying-ying)

Parigi. EPA/IAN LANGSDON