Katarzyna Lassak is a Polish virtuoso violinist, a graduate of the Chopin University of Music in Warsaw (2020), where she received her PhD degree with honours (2022), under the direction of Professor Janusz Wawrowski. She made a world premiere recording of the forgotten Violin Concerto No. 2 "Highlander" by Jan A. Maklakiewicz with the Polish Radio Orchestra, at the Witold Lutosławski Concert Studio. Katarzyna Lassak comes from a highlander family from Zakopane (Southern Poland, Tatra Mountains), which continues multigenerational history of folklore music traditions. She is a lead violinist of the Lassak "Helios" Family. During her concerts, she often juxtaposes her interpretation of folklore-inspired classical music with traditional performances of Podhale music.

She has performed as a soloist with the symphony orchestras of the Karłowicz Philharmonic in Szczecin, Kolberg Philharmonic in Kielce, Paderewski Pomeranian Philharmonic in Bydgoszcz, Baird Philharmonic in Zielona Góra, and the Polish Radio Orchestra in Warsaw, as well as the chamber orchestra Warsaw Players, Tatra Mood Orchestra and Atom String Quartet. She has worked with such conductors as Michal Klauza, Lukasz Borowicz, Paweł Kapuła, Przemysław Fiugajski, Agnieszka Kreiner and Norbert Twórczyński. She has performed at the international music festivals, including the String Festival “Masters of Polish Violin Playing”, "Emanations", "Gaude Mater", "Musical Spaces", "Musical Gardens" and the Piotr Janowski Festival. She has played recitals at the ROMA Music Theater, the Karol Szymanowski Museum in the "Atma" villa, and the Presidential Palace, among others.

She is the winner of many competitions. At the age of 18, she won the "Let's Remember Osiecka" Vocal Competition. During the last year, she won 9 first prizes at the national and international competitions, including: Grand Prix "Sabała's Fiddle" for the best instrumentalist at the International Festival of Highlander Folklore, and the "Dziadońka's Bow" Honorary Award. She was a recipient of a scholarship from the Minister of Culture and National Heritage. In 2023, she was awarded the honorary title of „Wierchowa Orlica” (Mountain Eagle).