Jessica Simpson has lost 100 lbs in 6 months: 'Yes, I tipped the scales at 240'

It took a whole lot of determination, but Jessica Simpson is celebrating a major milestone in her weight loss journey: She's shed an incredible 100 pounds since giving birth six months ago.

"6 months. 100 pounds down," Jessica wrote on Instagram Tuesday. "Yes, I tipped the scales at 240."

She added, "So proud to feel like myself again. Even when it felt impossible, I chose to work harder."

The mom of three posed in front of her house wearing a black bell-sleeved midi dress, cinched her newly-whittled waist with this black laser-cut belt.

Since welcoming her littlest one, Birdie Mae, on March 19, Jessica has only posted a handful of full-body photos. But during the pregnancy, she wasn't shy about showing off her rapidly-growing belly: "Jess-tation," she captioned a bikini photo taken just days before she went into labor.

She also posted snaps of her ultra-swollen feet and even one of a toilet she accidentally broke. "Warning... don't lean back on the toilet while pregnant!" she good-naturedly captioned the image.

20 PHOTOS
Jessica Simpson's third pregnancy
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Jessica Simpson's third pregnancy
Jess-tation
#tenyearchallenge (📸 @backgrid_usa)
Warning...Don’t lean back on the toilet when pregnant 🤦🏼‍♀️
Little girl and I had a great night at FFANY Shoes on Sale for an amazing cause 💕 @FFANYshoeshow @QVC #shoes4acure #ishopforher
My Baby Love
After a week in the hospital for bronchitis (my fourth time in 2 months), I’m finally home!  Coughing with Birdie has been a crazy painful journey. I am slowly getting healthier every day. Baby girl was monitored and is doing amazing! 🙏🏼 I am on my way to healthy and counting down the days to see her sweet smile. Sending love and prayers to all the mothers who are going or have gone through this. OUCH
All you moms out there know what it feels like to have your face feel bloated and swell during pregnancy 🙈! Being a #teamipartner and using @teamiblends natural green tea detox mask has been a serious lifesaver right now- it’s gentle on my skin, pulls out my blackheads (AMAZING) and leaves my skin soft and tight. 😍 I definitely stand behind this brand and love that it’s American based and female founded 💃🏻🇺🇸. I hope you ladies treat yourself to an affordable at home spa day and save 25% by using code: JSIMPSON when you get it! #thankyouteami #cleanskincare
Severe pregnancy acid reflux has led to the purchase of my very own sleep recliner 😂🤣🤗
Tight squeeze but I’m pushin’ through
Thank you @lorissaskitchen for these delicious snacks. I love that they were made by a mom to help other moms and dads with healthy snacks to feed their families on the go #sponsored #healthyfamily #whatareyoumadeof #protein #snacks #ad
💚 Birdie’s Nest 💚
Sick Day
All leopard everything this Christmas 🎄
Church ready 🙌🏼🎄💚🙏🏼 #THEJOHNSONS
❄️ Snow Day Memories ❄️
It was so much fun showering and sprinkling my best friends @austagram and @kokobahler this weekend 💕 #bumpingwithmybesties
💋 NYC
To me, beauty truly comes from within and when I feel good in my own skin, and the clothes that are covering that skin, I can project my best self.
FFANY with one of my faves @katyperry 🔥
Baby Girl and I are saying Bye Bye Big Apple
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Jessica and her husband, Eric, are also parents to 6-year-old Ace and 7-year-old Maxwell.

"I pray in every lifetime I find you and we re-create the beauty of what we have again and again," Jessica wrote to her husband on his 40th birthday earlier this month.

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Jessica Simpson and baby daughter Birdie
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Jessica Simpson and baby daughter Birdie
While the other 2 kiddos are off at school, this little lady and I snuggle a lot 🥰😍💚 #BIRDIEMAE
Happy Easter from the Johnson Family, Party of 5! 🐣🐇🐰
Post workout snuggles 💕 #BIRDIEMAE
My little labor of love this year 🥰 #BIRDIEMAE
Happy 7th Birthday to my forever best friend and baby girl. You have given me the truest, most precious purpose of life. Without question you are the coolest, most compassionate person I know. I love you. I wish I could blame all of my tears on hormones today 😭🥳💚 #MAXIDREW
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