She may have just been put through her paces by her fiancé at the gym, but Kelly was all smiles as she was snapped after her gruelling workout.
And the model even still managed to look fresh and fabulous in her gym lycras after her get fit session - so not fair!
Teaming a black vest top with a pair of skintight purple patterned leggings, Kelly, 34, showed off her famous curves and very cool trainers complete with neon laces. Always one to inject a bit of glamour, Kelly accessorised her sportswear with her trademark LA red sunnies and an oh-so-chic matching red Chanel bag.
Joining the brunette beauty was her buffed up beau and former Gladiators star, David. Sporting an eye-wateringly tight pair of lycra leggings, David gave Kelly a run for her money with his choice of gym gear.
Wearing a loose fitted vest on top, David, 28, treated Kelly to a very muscular display as he flaunted his biceps and tattoos... Not a bad gym partner to have, 'ey Kel?!
Enjoying the LA lifestyle of late, Kelly and her man have been known to work out together throughout their stay. As well as many trips to the gym, David and Kelly even purchased new bikes recently as they enjoyed a biking trip in Beverly Hills.
Not only has Kelly landed herself a role in new US TV show One Big Happy which means she will be spending a lot more time Stateside as filming begins, she recently became the new ambassador for America's big name shoe brand, Skechers.
Well the girl definitely knows how to work a pair of trainers if her latest gym pics are anything to go by.
Announcing her latest project on Instagram last week (10 July), Kelly shared a snap of her at Skechers HQ, along with the caption: "Skechers HQ Manhattan Beach with the lovely Michael Greenberg. Signing my Contract to be the new Ambassador. So excited to be working alongside such a fantastic team #Skechers."
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