Katarzyna Nosowska, born on August 30, 1971, in Szczecin, is a Polish alternative rock singer, songwriter, composer, writer, columnist, and radio presenter. She began her musical journey in high school, singing in a choir at the technikum odzieżowe in Szczecin. In the late 1980s and early 1990s, she was part of several bands including Szklane Pomarańcze, Włochaty Odkurzacz, Kafel, Dum dum, No Way Out, and Vivid. In 1992, she founded the band Hey with Piotr Banach, Marcin Żabiełowicz, Robert Ligiewicz, and Marcin Macuk. The group achieved success, releasing albums such as Fire (1993), Ho! (1994), and Live! (1994). She also released solo albums like Puk.Puk (1996) and Milena (1998). Her notable collaborations include the single "Tramwaje i gwiazdy" with Miuosh. Throughout her career, she has been awarded multiple Fryderyk awards for her contributions to Polish music.