Amelia Anisovych, as the seven-year-old girl is called, was caught on film performing the popular song "Let it Go" from the film Frozen in Ukrainian in a shelter in Kyiv in early March.
The video was then shared on Facebook and has currently received several million views since it was first published.
Fled to Poland - performed at a charity gala
During the night until Monday, a new video of the seven-year-old girl appeared.
This time when Amelia Anisovych sings the Ukrainian national anthem for thousands of people at a charity gala in Poland, where she moved with her family.
The charity concert "Together with Ukraine" was held at the Atlas Arena in Lodz, Poland to show solidarity for those fleeing the war in the neighboring country.
Some of Poland's and Ukraine's greatest artists were on stage.
The gala was broadcast on both Polish and Ukrainian TV channels, writes Polish news.