Taylor Swift And Idina Menzel Perform 'Let It Go' In 'Frozen' Costumes

She's reached peak Taylor.

Taylor Swift made the last U.S. stop of her "1989" tour a good one. 

The pop star has paraded a seemingly never-ending cavalcade of celebrities on stage throughout her world tour, but audiences in Tampa, Florida, might be the luckiest Swifties yet.

Swift celebrated Halloween in style with special guest Idina Menzel. The two took to the stage Saturday dressed as the characters Olaf and Elsa from the Disney smash hit "Frozen."

Swift documented the evening in all its glory on her Instagram account. 

"Frozen totally happened tonight," she captioned one of many videos. "And 55,000 people sang 'Let it Go' so loudly, it nearly took my breath away. Good times, @idinamenzel ☃."

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

A video posted by Taylor Swift (@taylorswift) on

Olaf vibes.

A photo posted by Taylor Swift (@taylorswift) on

After the costume change, while the crowd was singing.. Taking it all in with @idinamenzel

A photo posted by Taylor Swift (@taylorswift) on

Menzel called the guest appearance "the gig of a lifetime" and tweeted a thank you to Swift on Sunday. 

Swift also performed with newcomer Alessia Cara whose single "Here" has proved to be one of the year's biggest hits. Cara expressed her gratitude on social media.

“You are the classiest, sweetest, most lovely person and I can’t thank you enough for what just happened," she wrote on Instagram. "Also I can’t feel my body. Goodnight everyone I quit life.” 

Getting to share the stage with @alessiasmusic during 'Here'. Honestly couldn't be more impressed by this girl.

A video posted by Taylor Swift (@taylorswift) on


Happy Halloween, Swifties!

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Taylor Swift's '1989' Tour