Bella Hadid -- A Chain Gang Of 1 (PHOTO)

Bella Hadid does a body chain good ... real good.

Gigi's lil sis posted the pic on her IG and, we gotta say, it leaves very little to the imagination when it comes to what she looks like with her clothes off.

Bella apologized to mom and 'RHOBH' star Yolanda for posting the racy pic in the caption but we only see it being a problem if someone complains ... and ain't no one complaining.

Unclear if she was modeling the body chain or the thong ... but does it matter?

Answer: no.