Nightingale — the Swedish band featuring acclaimed musician/producer Dan Swanö and his brother Dag — performed at the Helvation festival, which was held on November 13, 2010 at Dante’s Highlight in Helsinki, Finland. Fan-filmed video footage of the performance can be viewed below.

Source: Blabbermouth.net

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http://www.youtube.com/watch?v=mKqmUa6v0l0&feature=player_embedded