Sisters Kim Kardashian and Kylie Jenner love a good shameless selfie, and this time they're both bringin' their little black dresses to the 'gram, but which famous bod has you saying, "Yes ma'am!?"

These pretty pics come from Kim and Kylie's respective social media accounts ... with Kim donning a lacy dress and Kylie rockin' an even lower cut gown. Of course both photos garnered the attention of their followers, but there can only be one lucky sister here!

Famous for their curves, the Kardashian-Jenner crew are always whippin' out their thirst trap pics -- click through the gallery above and see if you can guess who's who!

Now, for the task at hand ... only one of these sisters can get your vote. So the question here is, who'd you rather?!