Psiuk said he hoped Ukraine would host Eurovision next year and thanked the defenders of the besieged Azovstal steel works in the southern city of Mariupol for their courage in holding out for so long.
Fighters in the last stronghold in Mariupol have started to surrender, but a Ukrainian presidential adviser said their defiance had changed the course of the war.
Bookmakers had made Kalush Orchestra clear favourites in Eurovision. Their song "Stefania" that fuses rap with traditional folk music was lying fourth after national juries voted, but stormed into top spot thanks to a record score during voting by viewers.
