Rather than hosting a huge party at a club or shutting down a restaurant, the supermodel's birthday was surprisingly low-key.
Kendall Jenner is now one of the biggest supermodels in the world, but she didn't always exactly feel popular. In one pic, Kendall is wearing a long-sleeve black shirt with jeans, and is holding a balloon animal.
Later on, the birthday girl arrived at Hadid's apartment for pre-karaoke cocktails, chips and guac, and a homemade cake.
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Click inside to see more of the Kardashian-Jenner family's birthday wishes to Kendall...
Sounds like a day to remember. "I really was like, 'I'm never gonna have friends, ' and to look at my life now, it's so insane", Kendall continued.
"I love them so much.had to get them all", Bella wrote on Instagram Stories. "I don't want that to come off weird, but again, she's so happy with the life she's living", she said. Some people aren't as lucky as us - not everyone gets to have a sister and not everyone gets to have a love and bond that all us siblings have with one another. Let your confidence continue to shine and never be anyone but yourself. I am beyond blessed to be your mommy and I thank God every day for the privilege of spending my life with you. You are ideal in every single way.
And Kris Jenner, Kendall's mother, also had a sweet message for the model. I love you my sweet angel sister!