Girls' Generation's member Taeyeon celebrated member Sooyoung's birthday with her.

Yesterday, Taeyeon posted on her Instagram, "Happy birthday and I love you a lot, Sooyoung," along with a picture.

In the picture, Sooyoung had a birthday cake in front of her and was making a happy face.

Internet users who saw this commented, "Happy birthday," etc.

Photo Credit: Taeyeon Instagram