Beyonce's Rep DEFLATES Fake Preggo Rumors -- 'Stupid, Ridiculous and False'

Sorry Internet conspiracy theorists, Beyonce's rep claims her baby bump is 100% authentic ... despite a video in which her stomach appears to fold over, leading many to believe she was wearing a prosthetic.

B's rep told ABC ... rumors about the singer wearing a fake baby bump underneath her dress are "stupid, ridiculous and false."

Also, there are photos of Beyonce in a bikini ... in which you can clearly see her actual, pregnant stomach.

So, there you have it.