They both pull it off in their own way. It depends on what your preference is. Seungyeon looks more girly and cute in it, while Tiffany portrays a sexy look. I give Tiffany the slight edge in this one.
haha i saw this topic and i was just like~ ' is this a joke or sumthing?' ---- kara has like a pure image guess i thought wrong XD Well it's expected. everyone that age gets curious.