Maybe a little side-track, but I recently discovered this brilliant little Finnish folk song called "Ievan Polkka". There are dozens of versions on youtube; I can't understand a word of any of them, but I can't stop listening:

https://www.youtube.com/results?search_query=ievan+polkka

If you can only do three:

* https://www.youtube.com/watch?v=hqthspSKZV8 - Acapella from Finland, circa 1990s

* https://www.youtube.com/watch?v=PX5OARoNFpg - Modern Russia, I sincerely hope none of these folks get drafted

* https://www.youtube.com/watch?v=CAyWN9ba9J8 - One of my favorite things on the internet, a South African guy remixing an blind Turkish street performer playing a Finnish song.

Delightful stuff.