Ashley Roberts, 42, showcases her phenomenal physique as she flashes underboob and her taut abs in sexy black bikini during Dubai getaway

She regularly flaunts her sizzling physique on social media.

And Ashley Roberts turned up the heat again on Instagram when she shared a series of stunning snaps from her trip to Dubai on Wednesday.

The former Pussycat Dolls star, 42, looked stunning in a high-waisted black strapless bikini, which showed off her lithe physique.

Her tiny bikini top showed off a hint of underboob, while the bottoms sat high on her waist, elongating her toned legs to perfection.

The stunner, who is staying at the chic Caesars Palace resort, also shared a trio of stunning photos in which she can be seen wearing a bright yellow mini dress with a wrap center part.

Woah mama: Ashley Roberts turned up the heat again on Instagram as she shared a series of stunning snaps from her trip to Dubai on Wednesday

Soft yellow: The stunner, who is staying at the chic Caesars Palace resort, also shared a trio of stunning photos in which she can be seen wearing a bright yellow mini dress with a wrap-around center

Soft yellow: The stunner, who is staying at the chic Caesars Palace resort, also shared a trio of stunning photos in which she can be seen wearing a bright yellow mini dress with a wrap-around center

Ashley looked stunning in the sexy bikini as she got merry in her hotel room bathroom with a smoldering pout in place.

Her outing is well deserved as it comes after Ashley tackled Britain’s ‘most extreme’ obstacle course, where she grimaced as she fell into a puddle of water.

The singer undertook five crazy challenges in five days with Heart’s Amanda Holden, 52, in a bid to raise money for Global’s Make Some Noise Charity.

And after Amanda got the start by climbing Blackpool Tower earlier this month, Ashley took up the challenge.

Ashley got stuck in the mud as she raced against the clock on the 7-28k stampede, while finding £15,000 in donations hidden.

Ashley, who created ‘The Nuts Challenge’, had 50 minutes while live on Heart Breakfast where she had to crawl on her hands and knees and climb through obstacles along muddy banks and cargo nets.

After grimacing her way through the challenge, she happily held up bags of cash as she posed in front of a red buzzer at the finish line.

Stroll around: She flaunted her stunning figure in the racy look

Stroll around: She flaunted her stunning figure in the racy look

Wet and wild: Her getaway is well deserved as the trip comes after Ashley tackled Britain's 'most extreme' obstacle course, where she was seen grimacing as she fell into a puddle of water

Wet and wild: Her getaway is well deserved as the trip comes after Ashley tackled Britain’s ‘most extreme’ obstacle course, where she was seen grimacing as she fell into a puddle of water

After completing the challenge, Ashley said: ‘It was all terrible in a way. I rinsed a bit, but I still think there is mud in my hair that hasn’t completely gotten out yet.

“But yeah, it’s just been wet, muddy and cold going through all this. But you know, it’s worth it! It’s for charity.’

A day earlier, Amanda made history by courageously climbing 150 meters to reach the top of Blackpool Tower while presenting Heart FM.

Gruelling: Ashley, who created 'The Nuts Challenge', had 50 minutes while live on Heart Breakfast where she had to crawl on her hands and knees and climb around obstacles along banks and cargo nets

Gruelling: Ashley, who created ‘The Nuts Challenge’, had 50 minutes while live on Heart Breakfast where she had to crawl on her hands and knees and climb around obstacles along banks and cargo nets