Shoes!
In the Hot Summer Music Video, F(x)'s Amber wore Underground's Creeper (Thanks to Nadhira for correcting my idiotic mistake) Wulfrun Red Suede Roundtoe Interlace D-Ring Lace-up Creeper (I think, I can't get a close up, but it's either this or the other red pair in the link) and Sulli wore this pair of platform converse-esque shoes
Amber's shoes here and Sulli knockoffs here.
(Comment if you have a real link).
--Koko
Credits: Asian Popcorn (for images), Nadya, Sment, Creepers, Underground-cybershop, rowky