Eurovision is an annual song contest that is held amongst the countries in the European Broadcasting Union, or EBU for short, and has been going on since 1956.
It is broadcast amongst all the countries in the EBU whether or not they actually get into the final, which is the only stage 98% of the viewer base actually watches.
A couple of classics have won and have been catapulted into international stardom like ABBA winning in 1974 or Bucks Fizz with 'Making Your Mind' in 1981.
Anyways, skipping all the history and all the stages, in the final countries generally vote for their mates.
So Ireland will pretty much always give the UK at least some votes so we don't get nul points (we don't talk about Jemini).
Macedonia generally give Greece high points, Portugal normally give Spain high points, and the Scandinavian countries vote for each other.
The scoring system system works by voting by country. After all the songs have played, there's an interval period when you can vote. Then comes the voting stage, where it goes to every country that entered (normally around 40ish) and they give the results of that country's vote. So which ever country gets the most votes in a country will receive 12 points, the next best get 10, then 8, then 7 through 1.
But when it comes to voting for buddies, all the Baltics will give Russia at least 8, but without a doubt, Ukraine always gives Russia 12.
Until this year when Russia kind of ****** up with Crimea so every time Russia got more than 7, they got booed and Ukraine were so fed up with Russia then got a pathetic 4 points.
TL;DR?
Nobody likes Russia.