In the last few years more and more people see the European Union as a single entity, primarily in the context of business and politics, but the cultural aspects of it are slowly but surely growing as well, in part thanks to streaming services like Spotify and similar services for streaming TV shows and movies. 10 years ago it was strange for someone in Croatia to watch a Danish TV show or for someone in Poland to listen to a French song. Today, it is not as uncommon.
Adding a top chart which would display the most popular songs across the 27 EU nations would make it much easier to follow what's popular in the countries which decided that there will be no physical borders between them. Let's remove the digital border as well.