US singer Jessica Simpson recently shed seven stone in weight, having revamped her lifestyle after the birth of her three children.

The 40-year-old fashion designer has now taken to Instagram to flaunt her dramatic weight loss by sharing a snap which drove her fans wild.

The bombshell posed up a storm next to a swimming pool in skintight gym leggings, which accentuated her new slim figure, and exposed her boobs in a plunging sports bra.

Jessica oozed sex appeal as she showed off her killer curves by adopting a warrior yoga pose as the sun set in the background.

Fans flooded the comment section to give their approval for the jaw-dropping snap and praised her “putting in the work”.

On wrote: "You look so good! So healthy."

Another said: "LOVE THIS! ROCK ON SISTER GODDESS."

And Former Real Housewives of Orange County star Gretchen Rossi wrote: “Wow!! You look sooo good girl!! Keep doing whatever you are doing.”

Rising to fame in the noughties as a star of MTV's Newlyweds and as a country-western singer, Jessica has been in the spotlight from an early age.

The bombshell posed up a storm next to a swimming pool

Shunning the pressures of Hollywood, last year she decided to get fit through healthy eating and regular exercise, enlisting the help of personal trainer Harley Pasternak.

Opening up on her mindful attitude to fitness during an appearance on US series HSN last September, she said: "It's been a lot of hard work. I have to say that I have worked very hard.

"Everything that I've been eating is mostly made with cauliflower."

However, Jessica refuses to use the word "diet,” and prefers to take a balanced and positive approach to nutrition and snacks.

The beauty has shed more than seven stone since giving birth to baby girl in March 2019

She said: "I don't like the word 'diet.' I just ate a bag of Cheetos in the back.

"I do think that writing down what we eat is important to keep ourself in check."

Even though she has slipped back into her skinny jeans, Jessica, who is the proud mum to Maxwell, eight, Ace, seven and Birdie, one, revealed pregnancy took a natural toll on her physique.

She added: "When you're pregnant, I gain a lot, I mean, a lot. I didn't expect to gain as much with my third. I thought I'd learned my lesson, but apparently that's just the way God made me, very hungry and pregnant."

In August Jessica also showcased her transformation in a a pair of True Religion jeans from 14 years ago, and was thrilled to be able to fit in them once again.

Striking a pose in the mirror, Jessica celebrated her 40th birthday, suggesting her healthy new lifestyle was a happy start to the next decade.

She said: "I have kept these throwback True Religion jeans in my closet for 14 yrs (I'm not exaggerating!).