Whenever there is a reason to celebrate, there should be cake and a toast. And singing. A birthday is never good enough without some jolly singing.
At eurovision, singing also falls very neatly into the picture and some countries have taken on the task to celebrate this old contest in song.
When Eurovision turned 25, Belgium entered a Kraftwerk-inspired hommage to the Queen of Song Contest, not without a certain amount of tongue-in-cheek. Telex was a big name within the world of progressive synthesizer music and managed to confuse the greater part of the juries, barely missing out on the last place that would have granted them a most visible spot in the history books.
Telex - Euro-vision (Belgium 1980)
Twenty-five years later, at the next big celebration, it was Bosnia-Herzegovina that lit the candles on the cake and had cheerful girl trio Feminnem turn their entry, originally a love song while in their own language, into a birthday serenade.
The icing on the birthday cake was the ESC history/Abba tribute preview clip, resulting in every credible eurofan regularly bursting into a high-pitched "Hallooo Kopenhagen!".
Feminnem - Call Me (Bosnia-Herzegovina 2005 preview)
In between these almost compulsory celebrations, also Israel threw in a birthday song for reasons best known to themselves. It did way better than the other two, but that must be due to host country politeness...
Eden - Happy Birthday (Israel 1999)