Gigi Hadid Hits 18 Million Instagram Followers!

Gigi Hadid bares some midriff while heading out for the day on Thursday (June 2) in Los Angeles.

The 21-year-old supermodel walked alongside her good pal Kendall Jenner that afternoon.

PHOTOS: Check out the latest pics of Gigi Hadid

Congrats to Gigi, who recently celebrated a big milestone on Instagram!

“18 million. My gratitude will never fade. Thank you <3 :)," captioned a photo, which you can see below.

45+ pics inside of Gigi Hadid heading out for the day with Kendall Jenner…