Happy birthday to Sooyoung once again.  Seems like she had fun celebrating with her bestest friends in the world, her fellow Girls' Generation members!

She posted pictures from her private birthday party with her close-knit group of friends onto Instagram on February 11, writing her thanks in cute ways.  In the group picture, the queen of the day, Sooyoung, sits in the middle as all of the other members stare in awe of her awesomeness - what a perfect birthday celebration!

Check out more pictures below and Tiffany singing Happy Birthday to Sooyoung below!

https://www.instagram.com/p/BBnHdXxLVgB/

https://www.instagram.com/p/BBnYAPUrViY/

https://www.instagram.com/p/BBnZJYyrVke/

https://www.instagram.com/p/BBmyuxNLVnX/