Tim Boyles/LP5/Getty Images
Meredith Lepore
Nov 02, 2015 @ 8:00 am

Get ready to have your minds blown, Taylor Swift and Frozen fans. Over the weekend at the grand finale of the U.S. leg of Swift's star-studded 1989 tour, she really decided to let it go—with a bang. Her special guest was Frozen and Broadway star Idina Menzel at the concert in Tampa, Fla., but they didn't just sing the cover hit from the mega-popular film. They also dressed up in costume (as it was Halloween) with Menzel portraying Queen Elsa and Swift as the lovable snowman Olaf. 

Swift shared a picture of the two in their Frozen gear on Instagram with the caption, "Frozen totally happened tonight. And 55,000 people sang 'Let it Go' so loudly, it nearly took my breath away. Good times, @idinamenzel." 

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Tim Boyles/LP5/Getty Images for TAS

Swift first came out to sing "Style" in her Olaf costume, which may have tipped off fans that something special was coming. Menzel joined her shortly after and during the song, Swift made a very quick (and dramatic) costume change into a sparkly little number. Watch Swift sing "Style" below and then watch her costume change during "Let It Go" in the Instagram videos below.

Happy Halloween!

A video posted by Taylor Swift (@taylorswift) on

"The cold never bothered me anyway." QUICK CHANGE @idinamenzel

A video posted by Taylor Swift (@taylorswift) on

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Swift also posted this cute pic of herself backstage in the Olaf costume.

Olaf vibes.

A photo posted by Taylor Swift (@taylorswift) on

Swift's tour will be on break until Nov. 7 and then kick off its international leg in China and Australia. It will be hard to top this, but if anyone can do it, she certainly can! 

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