Similar to the OP is this seasonal thingie: http://www.yaeli.plus.com/newsite/htmls/singing.html
Extra credit: get them to sing the song in a round. 
Oh WOW! I just learned a lot! I always liked that bizarre video, but I thought it really was Swedish–I figured it was a silly nonsense song by some Middle-Eastern guy living in Sweden. I could read and understand the words, but it never occurred to me that it was a real Arabic song that just happened to sound a lot like Swedish! I’m blown away. Wow.
So is there a translation of the actual Arabic words to English? Is it a love song or something?
This one has been around for ever, but it’s still fun to watch:
Yatta
And I stumbled across this one yesterday - it looks like it might be actually quite a big phenomemon, just one that hasn’t ever come to my attention before:
Algorithm march (Watch it past halfway)
Well, that’s kinda comparing absolutes, isn’t it?
Awww.
That’s official then. Japan is both the cutest and the weirdest country in the world.
In that frame of mind, then, I present… Loituma techno!
And Chocolate Niblet Beans, just for the heck of it.
psst! Sunspace beat you to it!
Does Techno Viking count? (if you haven’t seen this before, wait for the bearded muscle man to dance)
Yes. Yes, they are. And that link frightened me. (The nekkid guys with the weird song.)
Whence came the next Crazy Frog-style meme: Holly Dolly Song
WTF is up with all the spinning leeks??? I found at least 30 vidoes with that same theme. And that song is now an earworm
More!
Classic Ok Go (for those under rocks)
Ok Go on Treadmills (the superior display of skill)
Weeeeeeeeeee! (Gonads and strife)
Shoes (warning, swear words) and the follow-up, Let me borrow that top (yet more swear words)
Here’s the original, if you didn’t find it already. The Details section on youtube has the lyrics in Finnish and English.
I have not the faintest idea what you are talking about.
Sorry about the Reichroll - I couldn’t help myself
Gelding=Castrati, I do believe.
The Boobah site is like crack to me. It has pretty much everything that all the other links have. Lots of fart noises, too. I never really understood that part.