Practically impossible.

Not very enjoyable this one.

to the site. I think that you are a non English speaker, and very interested in the Eurovision. Good for you, but of very little interest to the majority of people, and I didn't find the last few puzzles, enjoyable or interesting.
Try watching a few episodes of the programme on the web, or review the top rated puzzles on this site, to give you an idea of how the wall puzzle works.
Some more general knowledge connections will definitely be needed.