Fan-filmed video footage of Swedish female-fronted heavy rockers SISTER SIN performing the song “Sound Of The Underground” on February 26, 2011 at Backstage in Trollhättan, Sweden can be viewed below. The track comes off the band’s second album, “True Sound Of The Underground”, which was released in North America on June 22, 2010 via Victory Records and was issued in Europe on July 23, 2010 through Metal Heaven Records. Source: Blabbermouth.net