Even Nicki Minaj isn't sure if her butt is Photoshopped or not

OH MY GOD. LOOK AT, LOOK AT HER BUTT.

Excuse us for taking a little Anaconda sing-along break, but ... whoa.

Naturally, Nicki Minaj loves reminding us that her butt is still on Rick Ross  -- you know, fat -- but she hasn't exactly taken a measuring tape to it.

So, when fans accused the Queen of Cakes of using Photoshop to enhance her, um, assets, she hit up music video director Grizz Lee for answers.

Yes, even Minaj herself had to check to see if that was ALL her, and we're not even mad.

Circumference game crazy.