141227 Girls' Generation Sooyoung expresses her excitement to watch S.E.S on 'Infinity Challenge' with Seohyun

141227 Sooyoung Instagram update

syofgg: "Ah, my shoulders are dancing and I'm getting happy too. I'm proud of our Seohyun who is standing shoulder to shoulder with huge sunbaenims. ❤️ I should've gone to watch in the audience!!! Looking forward to next week!! #ToToGa #InfiniteChallenge #SES"