Jackie ‘O’ Henderson recently shed a whopping 18 kilograms.

And the Sydney radio queen, 48, looked sensational when she slipped into a figure-hugging pink dress for a pal’s 40th birthday at the weekend. 

Jackie, who only recently debuted her slimmed down figure, opted for a low-cut pink dress by designer Rebecca Valance at the Byron bash. 

The star was all smiles as she posed for the camera alongside her pal Gemma Jean and fellow radio star, Carrie Bickmore. 

Jackie opted for a glossy makeup look and wore her trademark blonde tresses in a sleek ponytail. She wore white Louboutin accessories. 

Radio queen Jackie ‘O’ Henderson, 48, flaunted her sensational 18kg weight loss as she slipped into a tight pink dress for a pal’s 40th birthday at the weekend. Left, Saturday. Right, last year

‘Weekend in Byron spent celebrating my besties 40th,’ Jackie wrote. 

Jackie’s fans went wild over the photos. 

‘Gorgeous,’ wrote Delta Goodrem wrote. ‘Divine,’ added Jessica Rowe. 

‘You look incredible Jackie,’ yet another added. 

The mother-of-one recently spoke about her new diet on The Kyle and Jackie O Show and said she often skips breakfast, a practice known as intermittent fasting.

‘Weekend in Byron spent celebrating my besties 40th,’wrote Jackie. Pictured with Carrie Bickmore, right

Jackie’s fans went wild over the photos. ‘Gorgeous,’ wrote Delta Goodrem

She also avoids carbohydrates, and satiates her hunger throughout the day by snacking on pre-cut pieces of steak.

‘I cook steak and slice it, and then I’ll just have a little sliver of steak if I’m hungry,’ Jackie said.

She resists splurging on high-calorie foods for lunch, opting to eat just ‘three little slivers of steak’ and a few Vietnamese rice paper rolls containing fish and cabbage.

Her co-host Kyle Sandilands was shocked by her small portion size, telling her: ‘A dog would eat more!’

For dinner, Jackie usually eats vegetables and a protein such as chicken or red meat.

In between meals, Jackie treats herself to smoothies and Starbucks Frappuccinos, a type of blended ice coffee drink.

The mother-of-one recently spoke about her new diet on The Kyle and Jackie O Show and said she often skips breakfast, a practice known as intermittent fasting

Jackie was forced to warn her fans last month to be careful after scammers used her name to promote and sell diet pills.

She shared a photo to Instagram of the fake campaign which featured images of her drastically photoshopped body.

‘Another day another scam!!! If you see me ‘advertising’ keto gummies, it ain’t true. But I’m loving their Photoshopped pics,’ she wrote.

Jackie was forced to warn her fans last month to be careful after scammers used her name to promote and sell diet pills. Pictured