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05/17/2013 12:15 pm ET Updated May 17, 2013

Mariah Carey On 'American Idol': Singer Causes Twitter Uproar With Performance (VIDEO)

On Thursday's finale of "American Idol," judge Mariah Carey delivered an ... interesting performance (above).

The pop legend sang a medley of "Vision of Love," "Make It Happen," "My All," "Hero," "We Belong Together" and her new single "#Beautiful" for a crowd of excited fans. Mariah's "Idol" performance was a highly-anticipated one, but it left something to be desired: Mariah barely moved in her tight-fitting feathered gown and viewers speculated that she had been lip-synching.

But according to her reps, Mariah's "Idol" performance was live.

"ET can set the record straight as Mariah's reps tell us she absolutely sang the entire medley ... completely live! Not only that, but we hear she delighted the crowd in between live shots by singing additional hits," Entertainment Tonight reported.

Do you think Mariah Carey was lip-syching during her "Idol" performance? Sound off in the comments.

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American Idol Judges Through The Years

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