We know she has to be super slender to work as a model -- particularly with all eyes on her as a girl who is perhaps the world's most in-demand supermodel today ... but is Bella Hadid getting too skinny?

We know it's not proper to weight-shame people and we're not doing that. Bella is beautiful and, by all accounts, healthy -- other than her battle with Lyme disease. She's been known to use the diet-of-choice for the fashion industry -- cigarettes (or vapes) and coffee.

Her prominent shoulder bones are on display in this skimpy black tank and the baggy jeans almost hide her thin waist and hips until you check her profile and see how tiny she is.

One thing we know for sure ... we're LOVING her curly locks! And so is boyfriend The Weeknd who surprised his lady with a visit during her time in New York to attend the CFDA Awards. Bella wore a stunning, low-cut sequined gown to the even and when the clock struck twelve, she didn't turn back into a housekeeper and the coach didn't revert to a pumpkin ... her prince charming picked her up and whisked her away for a romantic rendezvous in the city before she had to head home to LA and Hadid documented the sweet moment on her Instagram story. Awww!