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Must-see: Idina Menzel, Taylor Swift perform 'Let It Go' – in costume
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You won't want to miss this one, "Frozen" fanatics.
Taylor Swift got into the Halloween spirit Saturday night at her concert in Tampa, Florida, in a big way.
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According to MTV, Swift, dressed as Olaf from the hit Disney movie, told fans, "I don't know if you noticed, but we have a 'Frozen' theme going on here. If only Idina Menzel were here."
It turns out that Menzel was there. The singer, dressed as Elsa, joined Swift onstage, and the two belted out "Let It Go."
>> Click here or scroll down to watch some videos from the show
