Echosmith Join Taylor Swift on Stage in Philadelphia [VIDEO]

It looks like Taylor Swift wants to be like the "Cool Kids." She asked her friends from "Echosmith" to join her on stage last night at Lincoln Financial Field in Philadelphia, PA to sing their massive global hit.

I love how Taylor gets into the song, and really is a fan of pop music. She is the coolest chick on the planet as far as I'm concerned. Bravo Ms. Swift.

Taylor's 1989 World Tour hits the Xcel Energy Center in St. Paul for three shows this fall.