St. Vincent performs at the Coachella Valley Music and Arts Festival in Indio, California, U.S., April 13, 201. (Photo by Mario Anzuoni/Reuters)

A dancer poses for a photograph as part of the “Dance as Art” photo project in Times Square in New York, on September 22, 2014. (Photo by Carlo Allegri/Reuters)

A model gets ready backstage during a body art festival in Almaty, Kazakhstan, March 23, 2016. (Photo by Shamil Zhumatov/Reuters)

A woman cartwheels through the Coachella Valley Music and Arts Festival in Indio, California April 10, 2015. (Photo by Lucy Nicholson/Reuters)

Islamic female students practice the ancient Thai art of “Krabi Krabong” taught as a sport at the Darunsat Wittaya school on August 16, 2011 in Saraburi, Thailand. (Photo by Paula Bronstein/Getty Images)

Visitors attend a press preview of the 2012 Whitney Biennial at the Whitney Museum of American Art on February 27, 2012 in New York City. The contemporary art exhibition includes sculpture, photography, painting, installations, dance, theater, film and music and runs from March 1 through May 27. (Photo by Mario Tama/Getty Images)

A woman aims a World War II machine gun at a military show during celebration of the Defenders of the Fatherland Day in St.Petersburg, Russia, Tuesday, February 23, 2016. The day, celebrated in Russia on February 23, honors the nation's military and is a nationwide holiday. (Photo by Dmitri Lovetsky/AP Photo)

Korean War veteran Jon Sun Rye, 83 years old, walks after she paid respect to former leaders Kim Il-sung and Kim Jong-il at Mansu Hill in Pyongyang, North Korea, 15 April 2016. North Korea is marking the “Day of the Sun”, celebrating the day of birth of the country's founder, Kim Il-sung. The Day of the Sun is a national holiday. (Photo by Franck Robichon/EPA)