Taylor Swift dresses up as Olaf from Frozen for duet
Saying it's a 'perfect' way to end her tour
Taylor Swift saved the best until last when she finished her '1989' tour with a theme from Disney's 'Frozen'.
Getting into the spirit of Halloween, the star dressed as Olaf the snowman and sang her own version of 'Let It Go' - joined by the original singer Idina Menzel.
On Twitter the 'Shake It Off' star said it was a 'perfect way to end this amazing chapter'.
Watch them perform below.
We think she was maybe inspired by her cat? She posted this picture on Instagram saying the feline, Olivia, looks like a melting snowman.
'1989' was one of the biggest selling albums in the UK in 2015.