WARNING: Pressing the play button on these videos will very likely result in you watching them for longer than you thought you would.
I came across this clip a while ago on KillSomeTime.com, then stumbled on it again in Youtube:
I found out later that the song was by these people, Loituma:
The song has a massive following on Youtube and spawned more parodies than can easily be counted, some of which are actually kinda twisted:
And here's my favourite version, the Trance one, by Hatsune Miku:
As yet, I've NO idea what the hell is the significance of the damn leek.