There were a lot of amazing moments at tonight’s Diesel 30th Birthday bash in Brooklyn’s DUMBO, but probably the most surprising was when British hip hop star M.I.A. joined T.I. onstage, only to reveal a very VERY big baby bump hanging over her acid wash jeans! (See photo below.)

THE RUMORS ARE TRUE!

There is absolutely no denying it, she has GOT to be preggers… if she is NOT pregnant, dear lord, that is one hell of a beer belly!

It’s safe to assume that the father is M.I.A.’s fiance, Benjamin Brewer (son of Warner Music Chairman Edgar Bronfman).

M.I.A. came out later to do a short set of her own (part of which was with N*E*R*D*, where she didn’t do her usual spirited dancing–leaving that to her backup singers and dancers. However she looked absolutely STUNNING as per usual, with long flowing hair (and way too obvious roots–probably not keeping up the coif b/c mommies shouldn’t dye their hair) and rocking tons of spandex bodysuits and leggings, accentuating her bulging belly, all the while looking like the coolest chick in the whole joint.

More photos of the Miss M.I.A.:

Here is a photo of her grazing her belly:

M.I.A. is one hot mama!