Singing Christmas Animals sometimes called a Living Christmas Animals, is an artificial Christmas animals filled with singers used as part of nativity plays. Singing Christmas Animals that enter a singing competition, hosted by a koala hoping to save his theater. Singing Christmas Animals received positive reviews from critics. Sing delivers colorfully animated, cheerfully undemanding entertainment with a solid voice cast and a warm hearten. Sing is like an album with a good song here and there, but too much filler and not enough hits.