Mariah Carey Quotes 'Mean Girls' To Katy Perry In Epic Twitter Exchange

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Mariah Carey Quotes 'Mean Girls' To Katy Perry In Epic Twitter Exchange

Who knew Mariah Carey was such a pop culture expert? She and Katy Perry had a totally fetch Twitter exchange, when Mimi responded to Katy's post with a "Mean Girls" quote – and put her fans to the test!


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