The whole epic moment went down at Ingrid's concert in Central Park on July 30. T-Swift and her BFF Karlie Kloss jumped on stage out of nowhere for a little dance number. It wasn't anything choregraphed or anything. Tay just hopped up and down in a cute, black romper. You know, typical T-Swizzle style stuff...
The best part of the whole thing was seeing her play the air drums during her dance off. We totally thought we were the only ones who still do that in public.
Just like the fans there, Ingrid made sure to brag about the awesome evening on social media, too. She even posted a selfie with Taylor.
"Central Park Summerstage was amazing. Great friends. Great guests. Great audience. I'm so thankful. And hungover," she wrote with the photo.
Watch Taylor and Karlie dance below.