In the opening scene, when the Broadway stars watch the story on Twitter about Emma, Principal Hawkins is identified in the news broadcast on TV as "Principal, Edgewater High School." The name of the school in the rest of the movie is James Madison High School.
A number of the scenes at James Madison High School show an open air cafeteria, with tables and lines for serving windows. There is no way a high school in Indiana would have an open air cafeteria like this, it is clear it was filmed at a high school in a warmer climate.
One scene shows a row of stucco houses in a California style but this is supposed to be set in small-town Indiana.
The music is so loud it often drowns out the singers.