Shared language, political past and shared media landscape also play an important role.

For example, over the last 10 years, Greece has given the Cypriot entry an average of 11.3 points, out of a total of 12. Cyprus has in return given Greece an average of 10.4 points per year of entry.

The two countries have a strong historical and demographic bond, with 78 per cent of Cyprus' population being Greek Cypriot.

Of course, the songs may play a part too - but the data suggests that people are right in thinking that a country's vote is not based on the musical talent of the contestant.

So, who won Eurovision 2016?

Ukraine beat Australia and favourites Russia to win the 61st Eurovision Song Contest.

Over the last 10 years, Ukraine has received the most votes per year from Belarus, Moldova and Azerbaijan. Meanwhile, in return, it has given Azerbaijan, Russia and Belarus the highest average vote per year.

There was speculation that the northern Europe bloc's existence and only Sweden's entry, neighbouring countries might put all their eggs in the Swedish basket, thereby raising the chance of another Swedish win.