Sara: "Big big Happy bday to my beautiful friend @gigihadid lot of love and happiness xxxxx 😘😘😘😘"
Bella: "happy birthday best friend. i love you with all my heart! thanks for bein the best sister out. you r awesome. HAPPY HAPPY HAPPY BIRTHDAY I WUV UUUUUU TAQUITO gigihadid”
Angie: "Happy Birthday you gorgeous chics! What a celebration this week, Gigi 19 and Alli 16 officially her Aussie bday today too 💗 @gigihadid allisimpson”
Liv: "Happy Birthday to the peanut that always makes me smile that big! Love you"
Bella: "happy birthday @gigihadid can’t wait to celebrate!!!!"
Leah: "Happy birthday to this absolute beauty @gigihadid my mouse xxx"
austyn: "Happy Birthday to my sister and muse @gigihadid. The world isn’t ready for what the two of us have in store. Shot by me. Styled by @daniellenachmani … Coming soon."
CRFASHIONBOOK: "Happy Birthday to our cover girl, @GiGiHadid! You’re amazing!! http://t.co/usOWcyB7X9”
SchonMagazine: "Happy Birthday @GiGiHadid ! You deserve the greatest of all time ! Much love from your Schön! Team"
Yolanda: "❤️Happy 19th Birthday my "Baby G" Thank you for being YOU and for choosing me to be your Mommy! You are my shining star and I feel blessed to travel this extraordinary journey with you! #ProudMommy #ILoveYou"
Alli: "happy 19th to my big sissy, best friend, advice giver, coffee brewster & dance bud @gigihadid ❤️ love you so much"
CR Fashion Book: "Best wishes on your birthday, @gigihadid!"