Girl group Girls' Generation's members celebrated their youngest member Seohyun's birthday.

"Seohyun's birthday party was yesterday! We ate good food and went to the karaoke too. We had such a great time," posted member Hyoyeon on her Instagram on Monday along with a picture.

In the picture, all the members of Girls' Generation are posing for the self-taken photo together. Even though all the members are wearing no makeup, they flaunt unchanged beauty.