A woman takes part in a four-minute flash mob pillow fight at the Old Town Square in Prague, Czech Republic, December 22, 2016. (Photo by David W. Cerny/Reuters)
DJ David Guetta (R) and rapper Nicki Minaj perform onstage during the 2017 Billboard Music Awards at T-Mobile Arena on May 21, 2017 in Las Vegas, Nevada. (Photo by Mario Anzuoni/Reuters)
Sara Sampaio attends “The Killing Of A Sacred Deer” screening during the 70th annual Cannes Film Festival at Palais des Festivals on May 22, 2017 in Cannes, France. (Photo by David Fisher/Rex Features/Shutterstock)
Female of pygmy hippopotamus called Malaya from Netherlands in zoo in Dvur Kralove nad Labem, Czech Republic, February 22, 2016. (Photo by David Tanecek/CTK via ZUMA Press)
A model wears a creation for Julien David's men Fall-Winter 2018/2019 fashion collection during a presentation in Paris, Wednesday, January17, 2018. (Photo by Francois Mori/AP Photo)