The Eurovision Song Contest is an internationally televised songwriting competition, organised by the European Broadcasting Union and featuring participants chosen by EBU member broadcasters representing their countries from across Europe and beyond.

Each Participating Broadcaster has until mid-March to choose a song and an artist to perform it. The song and artist can be selected through a televised national selection show (or shows), an internal process, or via any other means they decide.

Participants then compete at the Eurovision Song Contest, traditionally held in May.

The Contest format comprises three live shows: the First Semi-Final (Tuesday evening), the Second Semi-Final (Thursday evening), and the Grand Final (a Saturday night spectacular).

Participating Broadcasters work hard to prepare acts that will qualify from the show’s Semi-Finals, hoping for a ticket to the Saturday night Grand Final where they will join the so-called ‘Big Five’ broadcasters and Host Broadcaster (usually the broadcaster of the nation than won the previous year).

The ‘Big Five’ are the Participating Broadcasters from France, Germany, Italy, Spain and the United Kingdom - the group of countries who via their broadcasters make the biggest financial contribution towards the organisation of the Contest.

There is a comprehensive set of rules concerning participation that has evolved over the decades, but the main ones relating to competing songs and artists are:

Songs must be original and no more than 3 minutes in length

Lead vocals must be performed live

No more than 6 performers can take to the stage during any one performance

In each show, after all songs have been performed, each country will give two sets of points (1, 2, 3, 4, 5, 6, 7, 8, 10 and 12) to their favourite songs; one set is given by a jury of five music industry professionals from that country, and one set given by viewers watching the show in country. Viewers can vote by telephone, SMS and through the official app.

Out of fairness, you cannot vote for your own country.

In the Semi-Finals, only those countries who took part in that specific show, and those in non-participating countries - the "Rest of the World" - can vote (along with 2 or 3 of the ‘Big Five’ who are already in the Grand Final), whereas in the Grand Final, all competing countries and the "Rest of the World" can vote.

At the end of the Grand Final, the song that has received the most points wins the iconic trophy, and is performed once more.