VanderWaal is the youngest of three siblings (viaFamilytron).

In a clip that played before VanderWaal took the stage during theAGTquarterfinals, she explained her relationship with Olivia.

But did her sister Olivia even know that Grace had written a song for her?

Grace VanderWaal AGT Season 11 winner

But, ironically, the song dedicated to her sister Olivia was one that she had never played before.

She listened and started crying" (viaUSA Today).

And while the audience exploded after VanderWaal finishedsinging, judge Simon Cowell didn’t exactly love her performance.

Grace VanderWaal at premiere of Stargirl

He continued by saying that the show was about “finding potential,” of which VanderWaal has plenty.

Since her Season 11AGTwin, VanderWaal has definitely kept busy.

She released her album,Just the Beginning, in 2017.

And in 2020, she starred in the Disney+ film,Stargirl(viaPeople).