TaeYeon, Yuri and Seohyun for me. Jessica might be my favourite, but I can face the fact that she has nothing down there. It's fine she has Tiffany, who rates number 5 for me, by the way. Yoona gets 4.
TaeYeon, she loves ass and even has a cute one as well. That's some Tae the Frog magic right there.
Yuri, I wanted to put her as third, but I had to be honest with myself. She does sport that posterior very well and those hips don't lie.
Seohyun was a surprise, but when I saw those pictures, she fills her shorts just the right amount. Her ass is the equivalent of Baby Bear's porridge in Goldilocks and the Three Bears - just right.