The seventeenth story of Gravity Falls Rule 63.
When Marcus discovers that his favorite Pegasister singer is actually an illegal lab experiment, he plans to set her free. Meanwhile, Dana is convinced that Becca brainwashed William with her theremin.
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The seventeenth story of Gravity Falls Rule 63.
When Marcus discovers that his favorite Pegasister singer is actually an illegal lab experiment, he plans to set her free. Meanwhile, Dana is convinced that Becca brainwashed William with her theremin.