Kim Kardashian & Jennifer Lopez -- Asses Meet at Met Gala (PHOTO)

The Met Gala is where the biggest names in celebrity combine with the biggest names in fashion ... but it's also where Kim Kardashian's famous ass meets Jennifer Lopez's legendary backside.

KK acknowledged the moment by posting this homage to their posteriors ... snapped by none other than Kanye West.

There's no wrong answer, yet we have to ask ...