Finntroll is a finnish band combining different kinds of metal, some folk music and finnish dance music called humppa (similar to polka). They have quite interesting and unique sound. Their gigs are awesome, i've seen them couple of times and its always just a big party going on. Their next shows are in Spain, Ukraine and Russia.. you should go see them if they come around. Also their new cd should be out soon. Just listening to this song makes me want to have a couple of beers! Cheers :)