"13-year old America´s Got Talent winner Grace VanderWaal got the audience moving when she performed her two songs “I don´t know my name” and “Light the sky”, before she handed over the stage to honorary president of Special Olympics Austria, Arnold Schwarzenegger" (abilitychicagoinfo.blog)
Other performers at the closing ceremony were Helene Fischer (Soviet-born German artist) presenting the official anthem of the Games, "Fighter"- , Andreas Gabalier (Austrian Folksinger), and Rose May Alaba (Austrian singer) performing the Coca-Cola Unified Song "Can you feel it". It also included international dance and acrobatics performances by Cirque du Soleil artists and Dutch-American world dancing champion Louis van Amstel.
"The Special Olympics World Games are an international sporting activity for participants with intellectual disabilities, organized by the IOC-recognized Special Olympics organization. The first International Special Olympics Winter Games were held in February 1977 in Steamboat Springs, Colorado, US. In 1991. (Wikipedia)"