Scooby-doo! Stage Fright -

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In the 2013 film Scooby-Doo! Stage Fright , the Mystery Inc. gang unmasks multiple villains acting as a phantom in an old Chicago opera house. The plot focuses on a talent show competition featuring romantic developments between Fred and Daphne. The movie is noted for its unique twist involving four separate culprits and a sub-plot regarding the theft of a valuable diamond. Scooby-Doo! Stage Fright