OK, I admit that I'm insane. This is better than that addictive "Numa, Numa" thing the kids burned into my brain a while back, which IMO is a strong contender for lamest live performance video ever. At least these guys (Loituma) just sing. Northern Europe rules and Eastern Europe drools!
Try it. You'll love it. For a while, anyway. This should be in the dictionary as part of the definition of "catchy."
Brought to you (through me) by Aunt Jorene and Uncle Moritz. Blame them!