It's not even clear if Britney Spears is really pregnant or just really out of shape. Still at least one publicationis publishing what they believe will be the former pop star's due date.

Baby Due in September?

The month will be September reports Star Magazine.

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A release states:

It looks like Britney’s two babies will be exactly one year apart in age. A source tells Star that the new baby is due within a week of Sean’s first birthday on Sept. 14.

“Britney is about three months along,” the source says.

“She doesn’t believe in having babies three or four years apart,” the source says. “She wants to have hers close together. And they will be.”

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Denials have been back and forth from Camp Britney as the PR team has waffled a bit on if Brit and hubby Kevin Federline are actually expecting.

--Kate S. Campbell