f(x) Amber-Krystal Reveal Close Friendship through Funny Photos

Girl group f(x) members Amber and Krystal revealed their close friendship through photos.

On July 15, Amber posted on her instagram, "With Soojung," and gained attention.

In the picture, the two are posing for the camera and making cute faces.

Their close friendship could be seen through these photos and received much interest online.