The qualification of the centers of SM's girlgroups

You have to be pretty.. 

instiz

-Obviously..

-Even the members who aren't the center of their groups are all pretty..

-Eye candies..ㅠㅠㅠ

-Natural beauty..

-Seulgi is not the center of Red Velvet??

-You have to be so freaking pretty..

-Krystal is the center of f(x)..? I've never thought there was any center in f(x)..

-Whoa.. No wonder, it's SM..

-Yoona is too skinny..

-Does anyone know the contact lens that Irene uses in the last gif?

-Irene's eyes has an ability to draw people in.. God-Joohyun is really pretty..

-They all look alike in my eyes... Hmm.. 

-God-Yoona..

-Not just the typical pretty, but you have to be extremely super gorgeous..

-They're all beyond the words 'pretty'.. They're already in 'Goddess' level..

-They have similar auras..

-Eugene looks amazing..ㅜㅜㅜ

-They're beyond 'pretty', even the word gorgeous is not enough to describe their visuals..

-I think I know what is it.. Goddesses who look good with no fringes..

-They all look innocently beautiful..

-Will I be as pretty as they are in my next life..?

-Whoa.. Eugene.. I'm speechless..

-They all look high-class and fancy..