Chłopcy Kontra Basia is a Polish trio from Kraków, playing alternative / folk / jazz music. Their main instruments are contrabass, percussion and clarinet, but sometimes they also use piano, beatbox and whatever they need to bring original atmosphere into their music. The members are Barbara Derlek aka Basia (vocals, clarinet), Marcin Nenko (contrabass) and Tomasz Waldowski (percussion, piano). The band debuted in April, 2010 and immediately took second place in Polish ethnic festival New tradition.