The fifth international choir festival “Harmony 2011” was held on 2 and 3 June 2011 with the participation of choir “Nightingale”, choir “The sound of Kirie” - Haifa, Israel, choir “Belfersingers” – Gorlice, Poland on the 2 June and choir “Sevtopolis” - Kazanlak, choir “St. Paraskeva” - Sofia and choir “Cantifolia” – Grasse, France. Trio “The Tenors” were special guest performers in the festival. They sang famous Italian, Russian and Bulgarian songs and received loud clapping and standing ovations from the audience.