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Gigi Hadid

INFphoto.com

Gigi Hadid spent her 20th birthday today doing what she does best: modeling sexy swimwear!

The gorgeous model, who finally said goodbye to her teen years Thursday, has been hard at work all day on the set of a sizzling bikini shoot for Seafolly in Miami.

For the spread, the blond beauty rocked a variety of two-piece swimsuits, including a blue bikini that showed off her toned tummy, her perky bum and cleavage. Gigi, who appeared to be in a great mood throughout the day, also rocked a strappy multicolored look while lounging by a pool. Look how her crystal blue eyes match the water!

Gigi Hadid

Gustavo Caballero/Getty Images

Gigi also got some supportive B-day shout-outs from her famous family on Instagram today. "happy birthday to my angel of a sister.yer my best friend and i wouldn't know what to do in my life without you...you are a true one of a kind gem," her little sister Bella Hadid wrote.

Her mom Yolanda Hadid added, "Happy 20th birthday to the most precious gift in my life. Thank you for being YOU and choosing me to be your mommy. #OneOfMyGreatestTreassures #MyBabyG @gigihadid."

Gigi Hadid

INFphoto.com

Gigi's boyfriend Cody Simpson also tweeted, "Happy 20th birthday to my best mate @gigihadid. You are a WOMAN of soul and substance.. I love you!."

Gigi replied with, "Feeling so loved and blessed today... I'm so lucky to have people in my life that make me feel at home even in a hotel! Thank you all, I love you!"

Happy birthday, Gigi!