Taylor Swift is officially a "cool kid"!
Last time, she surprised the audience of Detroit with Dan Reynolds of Imagine Dragons! During the 1989 Tour stop in Philadelphia, she invited more friends to join her onstage - American rock-pop band Echosmith!
Echosmith posted a short clip of their awesome collaboration with Taytay on their Instagram account! They had just as much fun as Taylor did!
Check out their full performance in the video below!
Video Source: Warner Bros. Records
What can you say about Taylor Swift's collaboration with Echosmith? Share your thoughts in the comments section!