The sound you just heard was Posh wetting her pants with excitement.

Oh look! The fashion industry has found another way to re-invent the misygonistic torture of foot binding! Weeeeeeeeeee! These are the shoes from designer Nina Ricci's latest Paris show. When you buy them to do the school run, they will add an impressive 28cm to your height.
Alternatively, you could just strap a couple of chairs to your feet.