Jackie ‘O’ Henderson had her fans doing a double-take on Sunday when she stepped out in Bondi for a birthday celebration at hotspot Sean’s.

The radio queen, 50, slipped her slender frame into a chic black blouse and leather-look trousers.

Jackie completed the look with stylish black heels and wore her blonde locks styled to perfection.

She added some extra glam with a pair of stunning gold earrings that caught the sunlight with every turn of her head.

Jackie’s all-black look was a dramatic transformation from her on-air attire which tends to be more casual and understated.

Jackie was joined by her fashion designer bestie Pip Edwards, stylist Steve Cordony and Darren McMullen’s ex-girlfriend Milly Gattegno.

Jackie ‘O’ Henderson had her fans doing a double-take on Sunday when she stepped out in Bondi for a birthday celebration at hotspot Sean’s. Pictured: Steve Cordony, Jackie, Darren McMullen’s ex-girlfriend Milly Gattegno and Pip Edwards

In February, Jackie revealed the secret behind her youthful appearance.

The radio star confessed her beauty secret on The Kyle and Jackie O Show as her co-workers lavished her with compliments.

‘I just get Botox,’ she told them.

‘I’ve gotten lucky with that. I do have lines though. I definitely do,’ she added, saying  she has smile lines.

In addition to using Botox, which removes wrinkles by temporarily paralysing facial muscles, Jackie splashes out on various spa treatments.

She also shared her recent luxury pampering session at an upmarket spa.

The Venustus day spa, located in the Sydney inner-city suburb of Paddington, offers pricey packages for those seeking to unwind.

The KIIS FM star explained she opted for the Intuitive Package, which included breath work, a massage and a sound bath.

The radio queen, 50, slipped her slender frame into a chic black blouse and leather-look trousers. Jackie completed the look with stylish black heels and wore her blonde locks styled to perfection

Jackie’s all-black look was a dramatic transformation from her on-air attire

The massage alone is priced at $353 while the two-hour package, which Jackie took part in, comes to $707.

Jackie shared a number of images from the serene environment.

‘Treating myself to a full body reset,’ she wrote in one caption, adding in another she was ‘a sucker for a sound bath’.

A sound bath is a meditative practice where instruments such as gongs, chimes and singing bowls are used to soothe.

In November, Jackie also revealed another pricey product she includes in her skincare regime.

Jackie and her co-host Kyle Sandilands interviewed Savage Garden frontman Darren Hayes and commented on how good his complexion was.

Darren said he uses collagen face masks from popular Japanese skincare brand SK-II.

Jackie remarked she now uses the very same face masks to keep her youthful skin, exclaiming: ‘Those are the ones I use, I love those!’

It is hardly a budget beauty secret, as the brand’s facial treatment masks cost a staggering $159 for a pack of six.