Right-wing Austrian Freedom Party (FPOe) presidential candidate Norbert Hofer sings on stage during his final election campaign rally at the Viktor Adler Markt in Vienna, Austria on May 20,2016. The Austrian presidential elections run off will take place on 22 May 2016.  / AFP / JOE KLAMAR        (Photo credit should read JOE KLAMAR/AFP/Getty Images)