Siwon attended Sooyoung’s early birthday party.

SNSD’s Sooyoung will celebrate her birthday this upcoming February 10th. However, it seems like she had an early birthday party, and her label-mate Choi Siwon also attended the party. 3rdWaveMusic uploaded a picture of this celebration on their official Facebook page.

“This is during Girls Generation SooYoung’s B-day.
Siwon and I are standing together
But there are some great friends in this pic: Jun Jung (far left) Jaeson Ma (3rd from left), Danny Jung the contemporary Jazz artist (right in the black), up and coming actress Claudia (black sitting)”

Rumor has it, the girl standing on Siwon’s right side is Stella Kim, who almost debuted as one of the girls of SNSD, rumored to be Siwon’s ex-girlfirend and Sooyoung’s close friend. Do you think it’s really Stella?

Well, advance Happy Birthday to our dearest Choi Sooyoung!