One of the games my child is playing throws in random memes, and on one level they were playing Ievan polkka, so I took him through the history of the song.

Finland 1952: Some folk comedy movie invidio.us/watch?v=IHSiWCqknTs

Finland 1996: You know what, let's jazz it up a bit invidio.us/watch?v=7yh9i0PAjck

Japan <=2011: Vocaloid! invidio.us/watch?v=ZjDZrReZ4EI

Finland 2013: You are finnished! We'll folkmetal it *and* we'll dress our violinist in your fighting pyjamas! invidio.us/watch?v=EaTISifHaeg