Britney Spears BSPEARS061106_1rumor.jpg
"Fake out the media? Good idea; let's do it! Whadaya think, Sean P?"

TMZ and Perez seem to think Jeannette Walls at MSNBC has the scoop on this, when all she really did was lift the story from us ... so just in case you missed it when I posted it on Sunday, here it is again -- the real story, from The Source! ...

So the boss man over here at X17 came up with this theory just after the birth of "Sutton Pierce," as Britney and Kevin's second child has been called ... He thinks Britney didn't actually give birth to a baby boy, but to a baby girl! Now Celebrity-Babies.com and others are reporting that Brit and Kev's baby is really named Jayden James, a nice androgynous name!

Click through for the reasoning behind the theory ... You've GOTTA read this shit!!!