Kylie Jenner has been posting semi-naked selfies and other pics that test the limits of Instagram's no-nudity policy for quite some time now.
But this past August, Kylie turned 18, which means 2015 will forever be known as the year that the youngest Jenner sister took her seductive poses and barely-there attire to a decidedly adult level.
It's impossible to pick just one photo that the reality star posted as the most shocking, and some of her pics were actually surprising for how modest they are.
(We figured Kylie would get tattoos this year. We didn't imagine you would need a microscope to see them.)
So check out the gallery below for Kylie's most memorable Instagram posts of 2015. We're guessing she'll push the envelope even more next year...but we have no idea how that's possible.
Kylie Jenner: Bikini and Fur Boots
Kylie Jenner recently posted a photo of herself in a bikini and fur boots. Not surprisingly, it quickly racked up hundreds of thousands of likes.
Kylie Jenner and Her Butt
Kylie Jenner shows off her rear end in this Instagram photo. She does this often online.
Kylie Jenner Seduces Followers
Kylie Jenner wrote that she had a "broken nail" in this photo. But why do we think no one is really looking at her nail?
Kylie Jenner, Bikini-Clad
We feel so dirty looking at this photo. Yes, Kylie Jenner has a banging body. But she's 17 years old here!
Kylie Jenner Side Boob Photo
Kylie Jenner is flaunting some serious side-boob in her latest Instagram pic. The reality star turned 18 just last week.
Kylie Jenner: Birthday Boobs!
Tyga posted an incredibly racy photo of Kylie Jenner to celebrate her birthday. Yes, it's racy even by Kylie's standards.
Wait! There's more Kylie Jenner: 43 Raciest Instagram Pics of 2015!! Just click "Next" below: