Maciej Kossowski's singing career begun with the most popular rock/big-beat group in Poland "Czerwono-Czarni," ( "The Red Blacks" ) in 1963. He performed approximately three thousand shows in Poland, Germany, Greece, Czechoslovakia, former USSR, Canada and USA. It is estimated that 5.000.000 people saw his live performances and on more then ten occasions he sung to as many as two hundred fifty thousand people in outdoor performances.

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