The Insider.com

Jessica Simpson was in a particularly revealing mood during her interview on today's On-Air With Ryan Seacrest, to where the pregnant star not only promoted her new NBC show Fashion Star, but also spilled some very intimate details on her and fiancé Eric Johnson's sex life.

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When asked if she was currently feeling intimate with Eric, Jessica exclaimed, "Yes, I am definitely feeling intimate -- I'm kind of unstoppable at the moment!"

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And true to form, the notorious over-sharer didn't just stop there.

"The big O is like the biggest O ever," she revealed.

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And how is Eric responding?

"He's always ready," she laughed. "It's pretty interesting how your body works."

TMI Jessica, TMI!