"The Eurovision Song Contest (French: Concours Eurovision de la Chanson) is an annual competition held among active member countries of the European Broadcasting Union (EBU).
Each member country submits a song to be performed on live television and then casts votes for the other countries' songs to determine the most popular song in the competition. Each country participates via one of their national EBU-member television stations, whose task it is to select a singer and a song to represent their country in the international competition.The Contest has been broadcast every year since its inauguration in 1956 and is one of the longest-running television programmes in the world. It is also one of the most-watched non-sporting events in the world, with audience figures having been quoted in recent years as anything between 100 million and 600 million internationally"
Past winners include ABBA for Sweden in 1974 with "Waterloo" and Celine Dion for Switzerland in 1988 with "No Partez Pas Sans Moi".
Here's a video of the the contestant representing Russia in the semi finals!