The 38-year-old has been spending time in France and Spain this week, during a well-earned getaway.
Kelly documented her trip on social media, in view of her 959,000 Instagram followers.
In one upload, the model showed off her good looks as she posed for a sultry selfie.
However, as she shared the beautiful capture, the Loose Women presenter admitted she had been fallen victim to a rather uncomfortable problem.
It came as Kelly explained her boyfriend Jeremy Parisi had promised her a romantic meal out.
However, the couple had been forced to wait outside in the scorching Spanish heat after their train had been delayed, and they were unsure what platform they should wait on.
The curvaceous beauty then explained she was feeling rather warm, as she announced she was sweating beneath her voluptuous bust.
Beside the snap, the This Morning reporter penned: “Let’s catch the Train to dinner he said! It’s an Adventure he said.. It will be Romantic he said…”
A rather fed-up sounding Kelly continued: “Delayed Train.. Still Waiting.
“Who knows what platform the Train is actually arriving on… we speak 4 Languages between us and not one is Spanish #UnderT*ttSweat.”
In the snap, Kelly could be seen smouldering towards the camera, as she extended her arm to take a selfie.
The model looked very glamorous as she stepped out in a cream and blue patterned blouse.
She accessorised the look with a simple gold necklace, and made a statement with some attention grabbing drop hoop earrings.
The brunette beauty opted for a centre parting as she swept her voluminous locks back into a sophisticated down ‘do.
Accentuating her natural beauty, Kelly had contoured her cheeks with a sweeping of bronzer, and finished the look with smoky eye make-up and rose pink lipstick.
Kelly was soon inundated with compliments, with one fan telling her: “Beautiful eyes and lovely lips.”
A second person swooned: “One stunning looking woman.”
“So much elegance! Beautiful,” gushed a third admirer.
Meanwhile, other social media users were quick to sympathise with Kelly about her overheating issue.
“With you there #undert*tsweat,” wrote one.
It came very shortly after Kelly was pictured clutching her breasts as she posed beachside in a throwback snap.
Sharing the memory on her official Instagram account, a younger-looking Kelly offered a sexy stare at the camera as she gazed over her right shoulder.