Fans have slapped on the party frocks and dusted off the national flags for this year's Eurovision Song Contest final, which is under way in Moscow, RT reported.

A hundred million people worldwide are expected to watch the show on TV - the most-expensive extravaganza in the event's history.

It's been a big week for international pop music in Moscow, and the excitement is set to peak in the next few hours.

Performers from 25 countries will rock Moscow's Olimpiysky Stadium as they try to convince judges and viewers at home that they have the best song in Europe. The country's who've made it to this year's final are: Albania, Armenia, Azerbaijan, Bosnia & Herzegovina, Croatia, Denmark, Estonia, Finland, France, Germany, Greece, Iceland, Israel, Lithuania, Malta, Moldova, Norway, Portugal, Romania, Russia, Spain, Sweden, Turkey, UK and Ukraine.