Jessica Simpson is on a quest to shrink to 130lbs before the end of the year.

Jessica Simpson tweeted a photo of her ample cleavage as she pushed Maxwell in her pram

But judging by her post-pregnancy cleavage – she may want to hold onto a few of those pounds.

The new mother tweeted a snapshot of herself – and her rather ample cleavage – that would leave most women salivating with a little envy from the sheer magnitude of her au natural bustline.

Alongside the picture, she added: ‘Just taking a walk around the block… Street legal???’

Yet Jessica is adamant she will shed 50 pounds in five months, and yesterday the 31-year-old was seen arriving at the gym to embark on her weight loss regime.

She was photographed getting out of her car and heading inside to begin her morning workout.

The Texan gave birth to her first child Maxwell with fiancé, former NFL star Eric Johnson, on May 1. 

Earlier this week it was revealed that the singer and reality TV star is on a strict timeline to lose the pounds for her upcoming Weight Watchers campaign.

For the weight loss mission, she will reportedly rake in $4million to reach her target of 130lbs.

Jessica has been seen several times in the past few weeks working out at Harley Pasternak’s gym in West Hollywood, where she has been getting private workout sessions. 

Yesterday, she wore black three-quarter leggings, a white tank top, a sporty black track top and black Asics trainers.

In addition to her exercise regime, Jessica is reportedly on a strict diet.

She recently told People magazine that she is eating protein-packed means and drinking home-mixed juices to help shed pounds.

But in another interview with In Touch magazine, friends say that the star, who is also trying to care for her newborn little girl, is feeling ‘stressed and overwhelmed’.

Sources told the publication that the singer, who weighed a reported 210lbs at the height of her pregnancy, is also physically exhausted.

@Mail Online