A patient from the Nise de Silveira mental health institute stands in costume during the institute's carnival parade, called in Portuguese: “Loucura Suburbana”, or Suburban Madness, in the streets of Rio de Janeiro, Brazil, Thursday, February 4, 2016. Patients, their relatives and workers from the institute held their parade one day before the official start of Carnival. (Photo by Silvia Izquierdo/AP Photo)





Men work to complete carnival floats in São Paulo, Brazil on February 4, 2016. (Photo by Rahel Patrasso/Xinhua Press/Corbis)





Artists blow bubbles in St. Mark's Square in Venice, Italy, Sunday, January 31, 2016. Carnival-goers in Venice are being asked by police to momentarily lift their masks as part of new anti-terrorism measures for the annual festivities. Police are also examining backpacks and bags and using metal-detecting wands before revelers are allowed into St. Mark's Square, the heart of the Venetian carnival. (Photo by Luigi Costantini/AP Photo)





Disguised members of a carnival band participate in the carnival procession (Fasnacht) in the historic center of Lucerne, Switzerland, 04 February 2016. (Photo by Alexandra Wey/EPA)





The 2016 Carnival King Momo, Wilson Dias da Costa Neto, left, holds the key of the city with Rio de Janeiro's Mayor Eduardo Paes, center, and the Carnival Queen Clara Paixao, right, at a ceremony marking the official start of Carnival in Rio de Janeiro, Brazil, Friday, February 5, 2016. (Photo by Leo Correa/AP Photo)





Rio de Janeiro's Mayor Eduardo Paes (C) kneels next to the “Rei Momo”, or Carnival King Wilson Neto (2nd L) as they pose for picture during the handing over of the ceremonial key to the city at the Cidade Palace in Rio de Janeiro, Brazil, February 5, 2016. The event officially kicks off the 2016 carnival week in Rio. (Photo by Sergio Moraes/Reuters)





Dancers and drummers forming a group known as “comparsa”, competes by playing and dancing to the rhythm of the traditional “candombe” music, in Montevideo on February 4, 2016 during the first day of the “Llamadas”, only one of events that make up Uruguay's carnival – the world's longest. (Photo by Pablo Porciuncula/AFP Photo)





Revelers wearing sheepfur costumes walk during the traditional carnival parade in Mohacs, 189 kms south of Budapest, Hungary, Thursday, February 4, 2016. The carnival parade of people, the so-called busos, dressed in such costumes and frightening wooden masks, using various noisy wooden rattlers to drive away winter. (Photo by Tamas Soki/MTI via AP Photo)





Revellers attend the “Urknall” (Big Bang), which initiates at 5 o'clock in the morning the carnival (Fasnacht) of Lucerne, Switzerland, 04 February 2016. (Photo by Alexandra Wey/EPA)





Participant Roxanne Omalo is costumed at the finals of the senior King and Queen of Carnival Competition at Queen's Park Savannah in Port-Spain, Trinidad and Tobago, 02 February 2016 (issued 03 Feb). (Photo by Andrea De Silva/EPA)





Some “Tschaeggaettae”, masked participants of the traditional carnival cortege, poses in the streets of the village of Blatten in the Loetschental valley, southwestern part of Switzerland, late 04 February 2016. During this sinister carnival, about one hundred Tschaeggaettae with huge wooden masks and animal furs crowd the streets of the villages to scare the people in the Loetschental, a valley where this custom is still alive. (Photo by Dominic Steinmann/EPA)





In this February 4, 2016 picture a masked participant of the traditional carnival parade poses in the streets of the village of Kippel in the Loetschental valley, southwestern part of Switzerland. During this sinister carnival, participants wearing wooden masks and animal furs, crowd the streets of the villages to scare the people. (Photo by Dominic Steinmann/Keystone via AP Photo)





Indigenous musicians play “Tarkas”, a native instrument, during the Anata Andina (Andean carnival) parade in Oruro, Bolivia, February 4, 2016. Hundreds of ethnic groups from Oruro province participated in the carnival. (Photo by David Mercado/Reuters)





Indigenous people joke during the Anata Andina (Andean carnival) parade in Oruro, February 4, 2016. Hundreds of ethnic groups from Oruro province participated in the carnival. (Photo by David Mercado/Reuters)