Kendall Jenner and Hailey Bieber got edgy in a photo booth as they playfully posed with middle fingers up on Saturday night when the pair attended Billie Eilish‘s star-studded 21st birthday.
Jenner, 27, and Bieber, 26, looked like they were having an absolute blast taking the black-and-white photos, which they both posted to their Instagram Stories.
Kendall also posted some sultry sepia shots of herself on Sunday, capping off a busy weekend for the supermodel as she celebrated her nephew’s epic 13th birthday on Saturday night as well.
![Happy Birthday Billie! Kendall Jenner, 27, and Hailey Bieber, 26, posed up a storm together in a photo booth on Saturday night when the pair attended Billie Eilish's star-studded 21st birthday in West Hollywood](https://i.dailymail.co.uk/1s/2022/12/19/01/65718317-11552381-image-a-1_1671413480120.jpg)
Happy Birthday Billie! Kendall Jenner, 27, and Hailey Bieber, 26, posed up a storm together in a photo booth on Saturday night when the pair attended Billie Eilish’s star-studded 21st birthday in West Hollywood
Looking glamorous like always, Jenner and Bieber joined Eilish in West Hollywood for her holiday-themed birthday bash.
The two stunners took to the black-and-white photo booth and embraced their silly side.
Joining Kendall and Bieber for photos was their friend Jesse Jo Stark, 31.
The three friends ran through the typical array of classic photo booth looks, flashing cheesy grins, sticking out their tongues, smooching their lips and flipping off the camera.
Eilish’s party came on the heels of her Friday night performance at the Kia Forum in Ingelwood, California, where the singing sensation was presented with a cake on stage by her tight-knit family and new boyfriend Jesse Rutherford, 31.
‘Want to take shots?’ Billie joked from the stage. ‘Give me two days. I am 21 in two days, it’s f••king unbelievable.’
![Not just a third wheel: Kendall and Bieber's close friend Jesse Jo Stark, 31, joined them in the photo booth](https://i.dailymail.co.uk/1s/2022/12/19/00/65714829-11552381-image-a-30_1671408881433.jpg)
Not just a third wheel: Kendall and Bieber’s close friend Jesse Jo Stark, 31, joined them in the photo booth
![Photo booth fun: The three friends ran through the typical array of classic photo booth looks, flashing cheesy grins, sticking out their tongues, smooching their lips and flipping off the camera](https://i.dailymail.co.uk/1s/2022/12/19/01/65718319-11552381-image-a-2_1671413492294.jpg)
Photo booth fun: The three friends ran through the typical array of classic photo booth looks, flashing cheesy grins, sticking out their tongues, smooching their lips and flipping off the camera
In addition to posting her black-and-white photoshoot with Bieber, Kendall shared a collection of solo sepia images with her 267 million Instagram followers.
The reality star looked gorgeous with her raven hair styled down in loose waves.
Jenner’s strapless look showcased her bare chest and shoulders, allowing a Givenchy padlock necklace to shine.
The show-stopping piece of jewelry adorned Kendall’s neck as she gazed into the camera and contorted herself in different poses.
According to various online retailers, similar Givenchy padlock necklaces range anywhere from $900 to nearly $2,000, depending on the different elements used in the piece.
Kendall certainly loved her Givenchy necklace, sticking it in her mouth at one point and licking the bulky chain.
![Sepia supermodel: Kendall also posted some sepia shots of herself on Sunday, treating her 267 million Instagram followers to four sultry images](https://i.dailymail.co.uk/1s/2022/12/19/01/65714819-11552381-Sepia_supermodel_Kendall_also_posted_some_sepia_shots_of_herself-a-138_1671412318331.jpg)
Sepia supermodel: Kendall also posted some sepia shots of herself on Sunday, treating her 267 million Instagram followers to four sultry images
![Stunning: The reality star looked gorgeous with her raven hair styled down in loose waves](https://i.dailymail.co.uk/1s/2022/12/19/01/65714817-11552381-Stunning_The_reality_star_looked_gorgeous_with_her_raven_hair_st-a-141_1671412318523.jpg)
Stunning: The reality star looked gorgeous with her raven hair styled down in loose waves
![Nice necklace: Jenner's strapless look showcased her bare chest and shoulders, allowing a Givenchy padlock necklace to shine. According to various online retailers, similar Givenchy padlock necklaces range anywhere from $900 to nearly $2,000, depending on the different elements used in the piece](https://i.dailymail.co.uk/1s/2022/12/19/01/65714811-11552381-Nice_necklace_Jenner_s_strapless_look_showcased_her_bare_chest_a-a-137_1671412318025.jpg)
Nice necklace: Jenner’s strapless look showcased her bare chest and shoulders, allowing a Givenchy padlock necklace to shine. According to various online retailers, similar Givenchy padlock necklaces range anywhere from $900 to nearly $2,000, depending on the different elements used in the piece
![Givenchy tastes delicious: Kendall certainly loved her Givenchy necklace, sticking it in her mouth at one point and licking the bulky chain](https://i.dailymail.co.uk/1s/2022/12/19/01/65714823-11552381-Givenchy_tastes_delicious_Kendall_certainly_loved_her_Givenchy_n-a-139_1671412318333.jpg)
Givenchy tastes delicious: Kendall certainly loved her Givenchy necklace, sticking it in her mouth at one point and licking the bulky chain
Jenner’s weekend was chock-full of A-list soirees.
The reality star – who was recently mocked for wearing a $7,750 ‘testicle’ jacket – rocked two different sexy looks on Saturday night.
The first was a form-fitting silver minidress and the second was a black silk gown with puffy shoulders and a plunging lace neckline.
Kendall rocked the silver minidress to DJ Zack Bia’s holiday party at Catch Steak LA before wearing it to Eilish’s 21st birthday bash.
Hailey Bieber and Jesse Jo Stark wore looks of black leather and faux fur as they accompanied Jenner to the Oscar-winning singer’s starry 21st, where the guest list reportedly included Avril Lavigne, Doja Cat, Khalid and Lil Nas X.
After celebrating Eilish, Jenner slipped into her black silk gown and joined her entire family for Mason Disick’s A-list Bar Mitzvah.
![Look #1: Kendall rocked two different sexy looks on Saturday night. The first was a form-fitting silver minidress, which we wore to DJ Zack Bia's holiday party at Catch Steak LA before wearing it to Eilish's 21st birthday bash](https://i.dailymail.co.uk/1s/2022/12/19/01/65699825-11552381-Look_1_Kendall_rocked_two_different_sexy_looks_on_Saturday_night-a-140_1671412318400.jpg)
Look #1: Kendall rocked two different sexy looks on Saturday night. The first was a form-fitting silver minidress, which we wore to DJ Zack Bia’s holiday party at Catch Steak LA before wearing it to Eilish’s 21st birthday bash
![Girls' night out: Hailey Bieber and Jesse Jo Stark wore looks of black leather and faux fur as they left Bia's party and accompanied Jenner to the Oscar-winning singer's starry 21st, where the guest list reportedly included Avril Lavigne, Doja Cat, Khalid and Lil Nas X](https://i.dailymail.co.uk/1s/2022/12/19/01/65699807-11552381-Girls_night_out_Hailey_Bieber_and_Jesse_Jo_Stark_wore_looks_of_b-a-142_1671412318733.jpg)
Girls’ night out: Hailey Bieber and Jesse Jo Stark wore looks of black leather and faux fur as they left Bia’s party and accompanied Jenner to the Oscar-winning singer’s starry 21st, where the guest list reportedly included Avril Lavigne, Doja Cat, Khalid and Lil Nas X
![Look #2: After celebrating Eilish, Jenner slipped into a black silk gown and joined her entire family for Mason Disick's A-list Bar Mitzvah](https://i.dailymail.co.uk/1s/2022/12/19/01/65698703-11552381-Look_2_After_celebrating_Eilish_Jenner_slipped_into_a_black_silk-a-143_1671412318834.jpg)
Look #2: After celebrating Eilish, Jenner slipped into a black silk gown and joined her entire family for Mason Disick’s A-list Bar Mitzvah
![Hailey's look: Hailey Bieber posted pictures of her Saturday night look to her Instagram on Sunday. The stunner looked radiant in a green off-the-shoulder minidress](https://i.dailymail.co.uk/1s/2022/12/19/04/65721619-11552381-image-a-1_1671425907930.jpg)
Hailey’s look: Hailey Bieber posted pictures of her Saturday night look to her Instagram on Sunday. The stunner looked radiant in a green off-the-shoulder minidress
![Festive and stunning: Hailey's festive glam made her lips pop with Santa red while she adorned her ears with gold](https://i.dailymail.co.uk/1s/2022/12/19/04/65721617-11552381-image-m-4_1671425933520.jpg)
Festive and stunning: Hailey’s festive glam made her lips pop with Santa red while she adorned her ears with gold
![Bieber fever: Hailey and her husband Justin Bieber, 28, shared a romantic moment in the photo booth](https://i.dailymail.co.uk/1s/2022/12/19/05/65721621-11552381-image-m-6_1671425994112.jpg)
Bieber fever: Hailey and her husband Justin Bieber, 28, shared a romantic moment in the photo booth