Katy Perry put on a surprise show in Australia for a young fan with a brain tumor.
Perry shared the story in a series of videos Wednesday on Instagram. The clips show the star preparing for the visit and spending time with Grace and her family.
"Today is one of those days where I actually feel like a unicorn," Perry said in one video.
"That's because I get to use my powers for good and meet someone named Grace who wasn't able to come to the show."
She tweeted about Perry's visit Tuesday.
"GUYS WE DID IT! @katyperry just visited grace! She's truely amazing and such a sweet person this was truely amazing!" Tiana wrote.
She will perform Friday evening in Melbourne.