According to the Mass Schedule posted on the parish web site, the 11 am mass on Sunday is with the choir. It might be worth a visit at that time.
My daughter also has a beautiful voice. She made select chorus in Jr. HS, and competed with choral students from neighboring schools for a prized position on the Suburban Council concert. She was one of only 4 students chosen to perform. It was a first and a last. Due to an LD, she had to drop chorus the following year.
The play is called “Czestokowa Musical Chairs” and is about a Catholic and Jewish family who are best friends in Poland during the Holocaust
I saw extracts from this musical a few years ago. It's a beautiful story. Glad to know it is still in production. Kudos to your daughter and to you, her mom, for your support and encouragement!
I am pretty certain that the 9:00a.m. Mass is also a sung Mass.