This year Mackenzie decided to join the Orange County Mormon Choral Organization (OCMCO). She was part of the Concert Choir (youth). There is a choir for children and also an adult choir and an orchestra. If you have never been to one of their performances I would recommend it. There is a winter show and a spring show at the Segresgtrom Center for the Arts in Costa Mesa. The performance is professional grade.
Here is the stage just before they came on to perform: