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Movie reveals "Poor Unfortunate Souls" at CinemaCon.

Pour one for the unfortunate souls missing out on CinemaCon. The yearly exhibition trade show attendees got to see Melissa McCarthy for the first time... Ursula in the upcoming Disney "The Little Mermaid" remake, complete with a jaw-dropping performance of the character's signature song, "Poor Unfortunate Souls."

Despite not giving a live performance, McCarthy traveled to Las Vegas to introduce a scene from the film, which features Halle Bailey as Ariel.

McCarthy flawlessly channels Tallulah Bankhead as the evil sea witch persuades Ariel to give up her voice in the stunning video.

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Ursula shimmies through the sea with her sidekicks Flotsam and Jetsam as she sings the evil anthem while donning dramatic makeup and a short, purple-like updo.

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And McCarthy, who is better known for her comedic skills than her singing ability, does indeed sing the song's high notes with ease.

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"The Little Mermaid" is a live-action adaptation of the 1989 Disney animated classic, and it tells the tale of King Triton's youngest daughter, who is enthralled by the sky.

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Ariel strikes a deal with her wicked aunt Ursula to change into a human in return for her beautiful voice.

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