If you want some serious fun, this is not for you. It is impossible to apply the word serious to this film in any way. This is hilarious fun, but it probably doesn't appeal to foreigners. As a Finn, I laughed my ass off though, so that tears came into my eyes. The tagline said: "You'll laugh. Or cry and laugh", meaning that you will laugh, or you will be compelled to do it. It is a much used Finnish saying, and it was true.
The problem about Finnish films is that they are rarely understood by foreigners. Foreigners seem to have a problem with direct nudity, especially I've heard remarks of masculine nudity. Not one single scene showed nakedness in the way Hollywood films usually do (I will not go into details, you know all about it). But I won't generalise, go and see for yourself. Finnish people just have a very different approach and attitude towards nakedness...
Exaggeration is the key that builds the humour in this film. Saara's song was lovely, but the way it was filmed was really over tragic, making it in fact funny. And sweet. The reveling of the brothers is also very tragicomic. Just like in Pahat pojat or Pitkä, kuuma kesä.