Hyoyeon's birthday was on September 22, meaning she already celebrated it in Korea, but international fans can continue celebrating today!  That's right, party on, fans!

Recently, fellow Girls' Generation members Jessica and Sooyoung posted pictures to wish Hyoyeon a happy 25th birthday.  Jessica wrote on Weibo, "Cheers! Happy birthday dear H!" with a 4-set picture collage while Sooyoung likewise relayed her sweet birthday message through Instagram with a picture of herself with Sooyoung and Tiffany.

Happy birthday, Hyoyeon!