WATCH: Taylor Swift sings 'Let It Go' in Olaf costume with Idina Menzel
The North American leg of Taylor Swift's 1989 tour wrapped on Halloween night and the singer celebrated by singing Frozen's 'Let it Go' with Idina Menzel.
Swift was decked out in an Olaf costume while Idina was channelling Elsa as they duetted on stage in Tampa, Florida.
Following the show Swift took to Instagram to say, "Frozen totally happened tonight. And 55,000 people sang 'Let it Go' so loudly, it nearly took my breath away. Good times."
Idina was the latest in a long list of random people to appear on stage with Swift during her tour. Other included Alanis Morissette, Karlie Kloss, Lena Dunham, Ricky Martin and Wiz Khalifa among others.