Suns out, BUNS OUT!
The very next day, the 18-year-old decided to give her boobs some rest and this time, showed off her butt!
In the (above) pic posted on Instagram, the famous pouter wore a skimpy pink bikini while hugging BFF Anastasia Karanikolaou!
We're pretty sure PartyNextDoor is loving every bit of this snap!
Summer is here, and so is Kylie's hot bod!
[Image via Kylie Jenner/Instagram.]