Watch Taylor Swift Sing “Let It Go” Dressed As Olaf From Frozen

Last night wasn’t just Halloween — it was also the last stop in the American leg of Taylor Swift’s 1989 world tour. (Aren’t you going to miss playing the game of Which Celebrity Will Join The Squad Next?) At her show in Tampa, Taylor Swift welcomed Frozen star Idina Menzel to the stage, and the two sang “Let It Go” as a duet, with Menzel dressed as Elsa and Swift dressed as Olaf. She also brought Alessia Cara out to perform her hit single “Here.” Watch both performances below, and check out what your other favorite pop stars and musicians wore for Halloween here.

"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

Happy Halloween!

A video posted by Taylor Swift (@taylorswift) on

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

wait what happened last night

A photo posted by ALESSIA CARA (@alessiasmusic) on