The big reveal! Jessica Simpson shows off her post-baby weightloss as she arrives for Katie Couric interview

Jessica Simpson shows off her 40lbs weight-loss (and little Maxwell's first bikini) on Katie Couric's new chatshow

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UPDATED:

00:04 GMT, 11 September 2012

She might not be quite ready to slip on a bikini herself, but Jessica Simpson has no such reservations about her baby.

The 32-year-old showed off little Maxwell's first swimsuit today as she shared a photo of the adorable four-month-old on Katie Couric's new chatshow.

Jessica herself kept her clothes firmly on as she made her much-hyped appearance as the very first guest on 'Katie'.

What a cutie! Jessica Simpson's daughter Maxwell shows off her first bikini in a picture the proud mother shared on Katie Couric's new chatshow Katie

What a cutie! Jessica Simpson's daughter Maxwell shows off her first bikini in a picture the proud mother shared on Katie Couric's new chatshow Katie

The singer wore a slimming black peplum Roland Mouret dress as she revealed she had lost 40lbs since Maxwell's birth on May 1.

Talking to Couric in her first big TV interview since becoming a mother, Jessica admitted she didn't realise how hard it would be to lose her baby weight.

'During pregnancy, I didn’t really think about it,' she said about her weight gain.

'I thought my doctors were telling me that it was just a lot of water and whenever my water broke my whole entire stomach would go down but that did not happen.

'All the weight did not come out with the baby.'

Showing off her figure: Jessica Simpson talked to Katie Couric about her battle to lose her baby weight

Showing off her figure: Jessica Simpson talked to Katie Couric about her battle to lose her baby weight

Support network: Jessica was joined by her WeightWatchers leader, who is guiding her through her weightloss journey

Support network: Jessica was joined by her WeightWatchers leader, who is guiding her through her weightloss

Now Jessica says she is 10lbs away from
her goal weight, and she’s using her daughter to get there.

'I
basically take her with me, whether it’s strapping her on me or
strolling around the neighborhood,' she said.

'My new goal is 14,000
steps a day.'

Jessica is breast feeding Maxwell, and said that sugar cravings had been an obstacle in her weight loss.

'I feel like
what made me eat more is my hormones and breastfeeding,' she confided in Couric.

'I’ve never
wanted chocolate more in my life. I’ve had to really stay
focused and focus on my diet and concentrate on what I’m putting in my
body.'

In great shape: The 32-year-old said her appearance on the show had been an incentive to stick at her weight loss plan

In great shape: The 32-year-old said her appearance on the show had been an incentive to stick at it

But unlike
most new mothers Jessica is been paid a heady amount to shed her weight.

The
Dukes of Hazzard favourite, who tipped the scales at more than 170lbs during her
pregnancy, is following Weight Watchers after signing a deal rumoured to
be worth $4million.

She said the programme was working for her.

'You have to track every bit, and you can't get away with the bites because they add up,' she said.

'You have to be completely honest with yourself, and I think just creating that relationship of honesty with yourself is so good.'

Opening up: Jessica talked to Katie Couric, on the debut episode of her new chatshow, Katie

Opening up: Jessica said the appearance had acted as an incentive to stick to her WeightWatchers plan

And she said appearing on the show had been driving her weight loss. 'I've
just had a lot of pressure on me and today was actually one of my
goals,' she said.

'Getting here in a comfortable and beautiful
dress.'

With the eyes of the world on her, Jessica also said her weight loss had been somewhat stressful.

'I've been pregnant for three years,' she joked. 'I definitely don't Google my name.

'I
try to avoid it completely. But I still subconsciously know that the
talk is going on so I think that every day that is a struggle for me.

First show: Along with Jessica, Katie was also nervous, comparing it to 'the first day of school'

First show: Along with Jessica, Katie was also nervous, comparing it to 'the first day of school'

'I understand that it sells magazines and stuff. But I wish I could get a cut.' she said.

And she added: 'There is a lot of pressure to lose weight. But I want to be healthy for my daughter.'

Talking about her fiance, Eric Johnson, Jessica admitted that the couple had yet to set a date to walk down the aisle.

But she said of the American football player: 'He's the best dad. Even my dad says that. He changes every diaper.'

Face of WeightWatchers: Jessica's advert for the diet programme was screened for the first time on the show

Face of WeightWatchers: Jessica's advert for the diet programme was screened for the first time on the show

Both Eric and Maxwell accompanied her to New York from their LA home for the interview.

'She had her first flight yesterday,' she said of Maxwell. 'She did not sleep. She slept the last hour but she didn't cry.'

Jessica said that having her daughter had transformed her life.

'Motherhood is a dream it really is absolutely amazing,' she said. 'My life is very different now.'

Now for lunch! Jessica Simpson and fiance Eric Johnson stepped out in New York today after recording her interview with Katie Couric

Now for lunch! Jessica and her fiance Eric Johnson stepped out in New York after recording her interview

Jessica Simpson

Jessica Simpson

Working mom: Even accounting for the slimming effects of black, Jessica looked to have lost weight

Despite her weight loss Jessica admitted she was worried about her appearance.

'I almost peed my pants, I'm very nervous,' she told Couric.

She wasn't the only one.

Couric herself told her audience: 'I feel like its the first day of school.Its so nice to be here. I am so thrilled today to finally be here.'

She had plenty of support – her daughters, aged 16 and 21, were in the audience.

Post-baby: Jessica in June, when she began her workout regime six weeks after her daughter's birth

Post-baby: Jessica in June, when she began her workout regime six weeks after her daughter's birth