'These buttons working overtime': Model Simone Holtznagel showcases her VERY ample cleavage in a tight black blouse

She's proud of her voluptuous figure.

And Simone Holtznagel put her sensational curves on display on Monday as she modelled a very plunging black blouse. 

The model, 27, showcased her ample assets in the Wheels and Dollbaby top, leaving the top two buttons unfastened to give her Instagram followers a real eyeful.

'These buttons working overtime': Simone Holtznagel put her sensational curves on display on Monday as she modelled a very plunging black blouse from Wheels and Dollbaby

'These buttons working overtime': Simone Holtznagel put her sensational curves on display on Monday as she modelled a very plunging black blouse from Wheels and Dollbaby

'These buttons working overtime,' she cheekily captioned the photo. 

Simone rose to fame on the 2011 season of Australia's Next Top Model.

And she is still turning heads a decade later, as she stunned in sheer lingerie during an at-home photo shoot last Tuesday.

The blonde flaunted her cleavage in a lacy bra and knickers in a sponsored post for underwear brand Honey Birdette.

Glam: Simone is still turning heads a decade after winning Australia's Next Top Model in 2011, as she stunned in sheer lingerie during an at-home photo shoot last Tuesday

Glam: Simone is still turning heads a decade after winning Australia's Next Top Model in 2011, as she stunned in sheer lingerie during an at-home photo shoot last Tuesday

The lingerie featured floral embroidery, and Simone paired the set with stockings and suspenders for a touch of Hollywood glamour.

She accessorised with drop earrings and a full face of makeup, and styled her long hair in loose waves.

It comes after Simone revealed in March she wouldn't be posting as many scantily clad photos on Instagram.

Seductive: The 27-year-old showcased her ample assets in a lacy bra and knickers, which she paired with stockings and suspenders for a touch of Hollywood glamour

Seductive: The 27-year-old showcased her ample assets in a lacy bra and knickers, which she paired with stockings and suspenders for a touch of Hollywood glamour

She told The Daily Telegraph she 'gets so much interaction when I post cooking stuff or making cocktails' instead.

'I think it is kind of refreshing for people to see, rather than just another chick half-dressed on Instagram,' she added. 

'I could post a photo in lingerie or swimwear every day but it gets old after a while.'

Changing direction: It comes after Simone revealed in March she wouldn't be posting as many scantily clad photos on Instagram

Changing direction: It comes after Simone revealed in March she wouldn't be posting as many scantily clad photos on Instagram 

The blonde bombshell shot to fame in 2011 when she placed second runner-up on Australia's Next Top Model. 

She later moved to Los Angeles, where she modelled for major brands like Guess, but recently moved back Australia. 

Simone landed her first Playboy cover in October 2015 in 'The College Issue'. 

Other offerings: She told The Daily Telegraph she 'gets so much interaction when I post cooking stuff or making cocktails' instead

Other offerings: She told The Daily Telegraph she 'gets so much interaction when I post cooking stuff or making cocktails' instead

Many talents: 'I think it is kind of refreshing for people to see, rather than just another chick half-dressed on Instagram,' she added. 'I could post a photo in lingerie or swimwear every day but it gets old after a while'

Many talents: 'I think it is kind of refreshing for people to see, rather than just another chick half-dressed on Instagram,' she added. 'I could post a photo in lingerie or swimwear every day but it gets old after a while' 

Simone Holtznagel showcases her cleavage in a tight black blouse

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