According to Taylor Swift, singer Andy Grammer was passing through Nashville, so she invited him to perform onstage with her at her show over the weekend. What a way for Grammer to pass the time right? 

According to PopCrush, the pair performed the song with Swift breaking out the dance moves as she sang with Grammer. She and Grammer had onstage vocal chemistry, and the crowd was certainly feeling it, too. Here's the video from the show: