The pair got into the spirit of the Halloween season, with Swift dressed as Olaf the Snowman from "Frozen" while Menzel portrayed Elsa the Snow Queen.

"Frozen totally happened tonight," posted Swift. "And 55,000 people sang 'Let it Go' so loudly, it nearly took my breath away." Swift's concert at Raymond James Stadium marked the final date of her North American tour in support of "1989."