Gigi sports a denim ensemble paired with Jacob & Co. and Alina Abegg jewelry as she arrives to her birthday party. Pictures show the model wearing the Jacob & Co. LOVE necklace, a pear shaped diamond ring and diamond band rings. She also rocked Alina Abegg's alien pinky ring, complete with purple eyes.
The supermodel wears a custom bustier by Denimcratic for her sister's bash.
The superstar singer arrives in style to the party, wearing a floral dress by Zimmermann, a Mango houndstooth coat and an Anya Hindmarch purse (with a cat on it, of course!).
T.Swift shared this cute photo with Gigi, Martha Hunt, Hailee Steinfeld and bestie Abigail Anderson on her Instagram Stories. "I love you so much Gigi," the singer captioned the group pic. "Happy birthday!"
Makeup artist Patrick Ta posted a video of the birthday girl's cake at the bash. "Happy birthday @gigihadid," Patrick wrote on Instagram Stories. "The love that I have for you is beyond this world."
"They come around once in a blue moon, a unicorn girl lighting up the world in magical rainbow colors, sprinkling glitter all around leaving a trail of gold dust wherever she goes," supermodel Helena Christensen captioned a series of pictures from the bash on Instagram. "Happy birthday beautiful girl @gigihadid."
Alana Hadid posted this photo with her sister to social media, writing, "@gigihadid so proud of you. 24 years of happiness and 124 more."
Bella, Mohamed, Alana and Gigi pose for a family pic in the photo booth.
Cocktails available at the bash included the "For Yolanda" drink, as well as "Taurus Juice," a nod to Gigi's Taurus astrological sign.
Gigi and Yolanda danced to Rihanna and Calvin Harris' hit song "We Found Love" at the party.
Strike a pose! The supermodels showed off their denim outfits on Instagram.
Olivia posted a photo booth pic with her pals on social media. "Happy birthday babyyyyyy @gigihadid," Olivia wrote on the Instagram Story snap.
Samuel Krost shared a video of Gigi, Olivia and more pals dancing to Britney Spears' song "Sometimes."