Wikipedia
Kollárovci
Kollárovci (Kollár Brothers) is a Slovak folk group formed in 1997, though their first album was not released until 2006. The group performs Slovak folk songs in the Podhale subdialect, which is a mix of Polish and Slovak. All members alternate between singing and playing instruments. Kollárovci is made up of three Kollár brothers and three other musicians. The group performs mostly in Poland and the Czech Republic, where they play on Šlágr TV.