The group's two blonde singers, Susan Aho and Johanna Virtanen, are long-time members of Finland's most internationally successful folk-rock band, Värttinä.
Singer Nina Lassender came second with around 38 percent, while the satirical humppa band Eläkeläiset (the Pensioners) captured 20 percent of the vote. The finalist was decided by a phone and SMS message poll.
Members of the band were surprised by their victory. However, they say the specifically Finnish theme of the song could win them points in Oslo. The band says they will perform in Finnish at the contest.
Finland has only scored victory once in the contest. In 2006, heavy metal band Lordi took the contest by storm with its song Hard Rock Hallelujah. The contest has been arranged by the European Broadcasting Union (EBU) since 1956.