A source tells Us Weekly that Jessica Simpson had a, ahem, windy moment during a business meeting for her denim line in late January. "While one of the executives was speaking in a room full of five people, Jessica let out a very loud fart," says the insider.

"Her mother [Tina Simpson] was there, and it prompted her to turn around and yell, 'Jessica!' The tension was extreme. No one knew what to say."

It wasn't Simpson's first brush with public flatulence: She famously cut loose on an episode of Newlyweds, telling then-husband Nick Lachey, "You love my stinky ass," and professed her fondness for between-the-sheets poots (a.k.a. Dutch ovens) to a radio station in 2008.

Maybe someone told Gerard Butler about her gassy fascination! When the actor, 40, with whom she shared a flirty dinner in October, joined her group at West Hollywood's Boa Steakhouse January 23, he steered clear. "They didn't sit next to each other," notes an employee. "She seemed to be nervous around him."

Read more exclusive Hot Stuff items -- John Mayer and Taylor Swift's date, Madonna's visit with Alex Rodriguez and more -- in the new issue of Us Weekly, on newsstands now!

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