Among her TV roles are Daring Do and Princess Cadance in My Little Pony: Friendship is Magic, Pearl in Steven Universe, and Katie in the Canadian cartoon Total Drama Island.

On 9 February 2020, Łaska was called to join Idina Menzel, Aurora and eight more of Elsa's international voiceovers to perform the song "Into the Unknown" during the 92nd Academy Awards.

Every international performer sang one line of the song in different languages: Maria Lucia Heiberg Rosenberg in Danish, Willemijn Verkaik in German, Takako Matsu in Japanese, Carmen Sarahí in Latin American Spanish, Lisa Stokke in Norwegian, Łaska in Polish, Anna Buturlina in Russian, Gisela in European Spanish and Gam Wichayanee in Thai.

[1] In 2008, Kasia met Jon Lord (Deep Purple) and he asked her to sing as a soloist in his Concerto for Group and Orchestra project for the next four years.

They performed together in Germany, Luxembourg, Switzerland, Brazil, Korea, United Kingdom, Bulgaria, Russia, Ukraine, Hungary, Italy, France, and in her home city Warsaw.