Aubrey O'Day's
proud of her weight loss -- and she wants the world to know!

The former Danity Kane singer shared a sneak peek of her latest modeling gig via Instagram on Tuesday.

"*NEW PHOTOSHOOT* ..Love working w @thetonyabrewer," she posted along with the black and white lingerie-clad photo.  

We think Aubrey's body looks a-m-a-z-i-n-g -- but, how do you think the 29-year-old looks?

Tell toofab in the comment section below, and click "Launch Gallery" above to see even more stars who've dropped some serious weight!

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