Gigi also posted a more recent pic with Bella, writing, "Wishing the HAPPIEST 23rd year around the sun to my custom bestie sweet sissy @bellahadid 🌼 Your big heart and contagious light bless every life you touch. I’m lucky and grateful to do it all with you. I LOVE YOU MORE THAN WORDS 🥂🥂🥂 B. DAY celebrations continue !!! 🥂🥂."