VIDEO : Taylor Swift and Idina Menzel Where 'Frozen' Costumes!

Taylor Swift?s star-studded 1989 Tour came to a close with one last final guest onstage with her, Idina Menzel, reprising her role as Elsa in the Disney animated musical feature, Frozen. Menzel performed ?Let It Go? while wearing an Elsa costume and was joined by Swift, who donned a snowman Olaf getup. Taylor posted a video of her quick change into a dress underneath the costume, as she whipped it off in one fell swoop to the tune of Idina proclaiming, ?The cold never bothered me anyway!?