Alesha, 41, sat on the floor of her home gym in the skintight outfit as she showed off her toned arms and stomach, as well as her tiny waist in the stunning snap.
Her hourglass proportions stole the show in the ensemble, as the top featured a plunging neckline and bottoms clung to her curves.
The judge has been embarking on a workout challenge during lockdown in a bit to tone up, and she stole the show with the impressive results.
Tying her hair into two small buns and stripping back the make-up bar a slick of red lipstick, Alesha wowed with her natural beauty as she smiled for the gorgeous snap.
She captioned it: “Feeling quite chuffed with myself today, I’ve completed my 12 week challenge of 3 workouts a week, sometimes 4 if I count the yoga sessions @azukaononye and I have been doing together.
“It’s taking a lot longer to achieve my goals this time around after having Anaya, but steady and consistent has been a lifesaver over the last 3 months and without having to completely compromise on the things I love to eat and drink too!
“I’m just getting started and even though I still have my good and bad days I am feeling strong! Thank you @janetmalinowska for keeping me motivated, mentally uplifted and focused.
“No matter how strong anyone appears to be we are all fragile, delicate creatures who need to take care of ourselves so we can take care of others around us. Sending everyone lots of love today.”
It didn’t long for the compliments to come pouring in for Alesha’s toned figure, as her fans gushed over the snap.
One posted: “You are a GODDESS!! you keep me uplifted!! hope you are staying safe with your beautiful family!! love ya.”
Another added: “Well done Alesha!”
A third chipped in: “Very encouraging Alesha!”
A fourth wrote: “You look incredible!!”
Alesha will be returning to screens for the rest of BGT’s 2020 series, as she and the other judges try to track down some more talent in the UK.
She, Amanda Holden, David Walliams and Simon Cowell are set to continue the season after it was delayed due to coronavirus.
Whilst the return and changed format are yet to be confirmed, fans are certainly eager to see the judges back.