Many older rock enthusiasts also turned out for the event, many of whom had been avid fans of the band back in the eighties.
Sielun Veljet treated their fans to an energetic ninety minute show on Saturday night.
Other performers at the event included rap artist Paleface and the progressive rock outfit, Von Hertzen brothers.
Some 21,000 tickets were sold for the event staged since 1971 in the town of Joensuu in eastern Finland.