Jessica posted this pic to Twitter after the baby was born - she says her breasts are still too large for her to jog.

How much does Jessica Simpson weigh right now?

The brand new Mom grew to an estimated 170 pounds while she was pregnant with her beautiful new baby and said she ate all the bad stuff that piled on the pounds because she said she thought the weight would fall right off after the baby was born.

Jessica once learned on reality TV that Chicken of the Sea is really tuna, and now has figured out that losing weight is still hard work, even after the birth of the first baby.

So - how much does she now weigh?

She's not yet saying, but the blonde singer and fashion executive now says she is within 10 pounds of her pre-baby size.

Life & Style claims that goal is 130 pounds, so that would mean she now weighs 140 pounds.

Recent photos seem to indicate otherwise, she looks a tad heavier than that.

She hasn’t revealed her current weight, nor what she weighed at her heaviest, but says she’s lost weight each week while on her new Weight Watchers program.

She is now a spokesperson for the company and her weight will be scrutinized.

An FYI, According to Us Magazine, Weight Watchers tells members that a healthy weight range for a person her height (5'3") is between 117 and 146.

Life & Style has this on Jessica's weight battle:

"The new mom has lost 40 pounds of pregnancy weight in just four months thanks to breast-feeding, marathon gym sessions and a personalized, no-starve Weight Watchers plan.

"Jess has been doing a lot of work on herself,” an insider tells Life & Style. “And she’ll gradually be showing her weight loss through Weight Watchers commercials over the next few months.”

The magazine item adds:

In fact, the singer and fashion mogul filmed her first commercial for the weight-loss company on Aug. 16. “She has met all her Weight Watchers goals and is overjoyed,” a friend tells Life & Style. “She’s so proud of herself.”

Jessica recently opened up to USA Today revealing her struggles to get back in shape.

“My body is not bouncing back like a supermodel,” Jessica said, “I'm just your everyday woman who is trying to feel good and be healthy for her daughter, her fiancé and herself.”

Simpson will make her national post-pregnancy reveal on the premiere episode of Katie, Katie Couric’s new talk show, on Sept. 10, 2012.

(Image: Twitter)