Taylor Swift Performs "Here" With Alessia Cara

At the Tampa stop of her monolith 1989 tour, Taylor Swift brought out Alessia Cara to perform her hit single "Here". Wrote Cara in the above Instagram post, "wait what happened last night."

Swift had another surprise for her audience—she wore a big puffy Olaf costume and sang "Let It Go" with Frozen star Idina Menzel. Watch footage below via MTV News.

@taylorswift thank you for showing me what 55,000 people looks like. you are the classiest, sweetest, most lovely person and I can't thank you enough for what just happened. Also I can't feel my body. goodnight everyone I quit life.

A video posted by ALESSIA CARA (@alessiasmusic) onOct 31, 2015 at 10:48pm PDT

Thank you @taylorswift13! That was definitely an out of body experience. Or out of Elsa's body! #1989TourTampa http://pic.twitter.com/oGPl9l6jp6

— Idina Menzel (@idinamenzel) November 1, 2015

Taylor wraps the U.S. leg of the #1989WorldTour with @idinamenzel singing "Let It Go"! #1989TourTampa http://pic.twitter.com/IFFPn6SOUJ

— Taylor Nation (@taylornation13) November 1, 2015

via Molly Beauchemin