Kim K and JLo vie for best in bare derrieres

The dress code at the Met Gala was anything goes, and for J. Lo, that meant, off with the sides of her Versace dress!

Here's a look at the front.

But wait! Kim Kardashian had yet to arrive. Her ENTIRE dress was pretty much made of nude netting. But especially the...backside.

(She was fine with that.)

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