Booty werk! Kendall Jenner recently showed off her perky backside in a bikini-clad Instagram photo. The model looked to be having a blast with her sister Kourtney Kardashian and a few other girlfriends as they posed in their swimsuits for a fabulous Sunday funday.

“Sunday’s for the girls,” the Keeping Up With the Kardashians star, 23, captioned the skin-baring mirror pic. The reality starlet can be seen standing in a cheetah print two-piece with a matching leopard print bucket hat. Of course, it’s hard to see anything besides Kenny’s bare booty smack dab in the middle of the photo.

View this post on Instagram

sunday’s for the girls

A post shared by Kendall (@kendalljenner) on

If you look beyond the Instagram influencer’s left cheek, you’ll notice the oldest Kar-Jenner sister wearing a T-shirt and neon green bikini bottoms while bending over and smiling in the mirror. The 39-year-old also posted a photo from their day hanging out in bathing suits on her Instagram Story. Standing in the background, it looks like Kim Kardashian, 38, also joined in on the sister day. She can be seen wearing a pink and white trucker hat that reads, “Can Cowboys Cry,” that matched her summery sarong. Her distinctive lid is actually from their close family friend Harry Hudson‘s music merchandise.

Kourtney Kardashian instagram story bikini photo

What about the other ladies? The whole family joined together to celebrate Rob Kardashian‘s birthday during a St. Patrick’s Day themed party on March 17, so they probably jumped in their swimsuits at some point during the day. Khloé, 34, shared a few photos from Rob’s party so we know she hung out with her family. However, we didn’t see her a bikini with her sisters. Womp, womp.

Kylie, 21, posted a few photos poolside with her main chick, Stormi Webster, who was clinging to her while they lounged outside on the beautiful day.

Basically, the whole reality family had a day of fun in the sun, but some showed off, er, more of their assets than others.