center when perform always change :) They have formation in each dance. But, don't worry! yoona always be a center in every mv/show. She always get her spot. She always be our and SNSD's center!
honestly, YOONA IS THE BEST!!! woow!...amazing...Yoona is so beautiful, sexy, elegant, great, fantastica and hot. beside...Yoona has very good and perfect voice...and...her dance is fantastic and the best!. Yoona is a complete artist!...honestly...YOONA IS THE BEST. GODDESS YOONA IS THE BEST!
Yoona was like "I'm so lazy to dance now. Naaa...i just need to move my body" BUT seriously...she can be sexy too without try hard. OMG....i'm falling more for this girl...
Love Yoona. Yoona she is already skinny, but when she is next to Sooyoung you can see that Yoona is not as skinny as Sooyoung. I hate how they criticize that Yoona is too skinny, but she has a nice and pretty body.