Oh, Jessica Simpson. This is why we love you!
The 32-year-old two-time mommy-to-be must be suffering from pregnancy brain - she let it slip that she's having a boy (in the most Jessica way possible, of course).
During an appearance on "Jimmy Kimmel Live" on Wednesday night, the adorable fashion mogul was lamenting the difficulty of her second pregnancy versus her first when she blurted out, "The crazy thing is I never knew a wiener could make me nauseous!"
After host Jimmy Kimmel burst out laughing, Jessica playfully swatted at him, saying, "Oh shush!"
"Well, I guess I just told the world that I'm having a boy!" she added.
Jimmy kept the audience in stitches as he continued to poke fun at the flustered "Fashion Star" judge's slip.
"Oh, I didn't even know what was happening! Maybe you were having a girl with a penis, I don't know!" he said. "Well, congratulations."
The late night host also asked Jess if reports she and fiancé Eric Johnson plan to name their second child Ace were accurate.
"Let's hope it's a boy!" Jessica exclaimed, before admitting, "I kind of just outed that I'm having a boy right? I can't believe I did that! That was not planned."
Copyright 2013 by NBC Universal, Inc. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.