Sing! (2001)

Sing! is a 2001 American short documentary film about the Los Angeles Children's Chorus, directed by Freida Lee Mock. How do squeaky-voiced 8 year olds become amazing singers? Sing! tells the story of how a community group, amid severe cutbacks in the arts, is able to develop a children's chorus that is one of the best in the country. It was nominated for an Academy Award for Best Documentary Short.

Unfortunately the movie Sing! is not yet available on HBO Max.