People look at a Christmas tree decorated with colourful lights at a residential compound in Beijing on December 8, 2017. (Photo by Nicolas Asfouri/AFP Photo)

An exhausted Rohingya refugee woman touches the shore after crossing the Bangladesh-Myanmar border by boat through the Bay of Bengal, in Shah Porir Dwip, Bangladesh, September 11, 2017. (Photo by Danish Siddiqui/Reuters)

Katy Perry poses backstage during rehearsals for the 2017 MTV Video Music Awards at The Forum on August 25, 2017 in Inglewood, California. (Photo by John Shearer/Getty Images for MTV)

The Aurora Borealis (Northern Lights) lights up the sky near the village of Pallas (Muonio region) of Lapland, Finland September 8, 2017. (Photo by Alexander Kuznetsov/Reuters/All About Lapland)

English fashion model Daisy Lowe seen at Christopher Kane at Tate Britain on Day 4 of London Fashion Week February 2017 on February 20, 2017 in London, England. (Photo by SAV/GC Images)

An Indian villager tries to tame a bull during a traditional bull-taming festival called “Jallikattu”, in the village of Palamedu, near Madurai, Tamil Nadu state, India, Monday, January 15, 2018. Jallikattu involves releasing a bull into a crowd of people who attempt to grab it and ride it. (Photo by R. Parthibhan/AP Photo)

People watch participants, whose faces are painted as popular Mexican figure “Catrina”, during the annual Catrina Fest, part of Day of the Dead celebrations, in Mexico City, Mexico, November 2, 2016. (Photo by Edgard Garrido/Reuters)

Sisters await the arrival of the caravan carrying the late Cuban President Fidel Castro's ashes in El Maja, Cuba, December 1, 2016. (Photo by Edgard Garrido/Reuters)