Shaping up: Singer Tulisa goes on a health kick as she works up a sweat with her 'militant' personal trainer

She already has a gorgeous body, but singer, Tulisa Contostavlos has clearly decided to go on a bit of a health kick.
The 25-year-old uploaded a series of pictures of herself to her Instagram account, which showed her working out with personal trainer, Peter Mac and her pal, Alex Thornhill.
The pretty star got into some pretty impressive shapes while doing so and even broke into a sweat as she swapped the gym for what looked like somebody's living-room.

Shaping up: Tulisa uploaded some pictures to Instagram of her and her friend working out with a personal trainer on Saturday

Tulisa looked effortlessly chic in a pink cropped sports top and grey leggings which she wore with a spotless pair of white high-top trainers.

She looked tanned and her newly highlighted blonde hair was tied half-up, half-down. Her friend Alex wore a contrasting blue vest top and dark blue cropped leggings.
Tulisa showed a surprising amount of flexibility during her workout.

Looking good: The newly blonde singer worked up quite a sweat during the session

In one picture, her trainer lifted her by her feet while she faced the ground, with her reaching back and clutching her feet to work on her stomach muscles.
Clearly pleased with her accomplishment, she wrote alongside the image: '@pmacfitness now that's what u call a friggin stretch.'
Tulisa and Alex then lay on yoga mats and stretched out their arms and tummies while lying on their fronts.
The Young star wrote: 'Back in training with @pmacfitness and @psychik_alex work work work work working on my sh****t' [sic]

Gym bunny: Tulisa looked cute in a pink crop top and grey leggings combo

Tulisa seemed to have been put through her paces during the session as she made sure she stretched her muscles out properly afterwards.
She wrote: 'My boy @pmacfitness went militant on me and @psychik_alex 2day, need some serious stretching after that getting myself ready #themovement.' [sic]
On Peter Mac's website, he writes that he's a personal trainer with a reputation for delivering results to clients through a combination of individually-tailored programmes alongside personalised nutritional advice.