You know what, as a Swede, I have to nominate the Danish national anthem as the coolest one I know of.
King Christian stood by the raised mast
His sword was hammering fast
As the heads and the brains of the Swedes were smashed
Who can escape?
Then he hoisted his red flag.... etc etc.
Hahahaha. **** you Demmark! Of course they play that every time the Swedish soccer team comes to Denmark.