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Alisons twin
Courtney in Pretty Little Liars is supposedly Alison's twin sister. And if you wanted to know it's not Alison that is dead it's Courtney they decided to switch and see what it was like to be each other and then I'm not sure how but it was Courtney who died when she was in Alison's place. Alison is still alive and is in a mental hospital.
she is ali`s crazy twin sister who actually was the one who died not ali.

ali killed Courtney

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7y ago

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