A Hollywood bikini model has publicly braved the needle in order to undergo a $9,800 bum lift in front of 200 guests and celebrities at a glamorous Beverley Hills event.

Kourtney Reppert, 33, from Los Angeles, decided to undergo the cosmetic procedure at the swanky party on Thursday night in a bid to confidently display her post-pregnancy body and 'make a stand for women'.

The mother-of-one, whose Sculptra Butt Lift was carried out by staff at the Beverly Hills Rejuvenation Center, bared her rear behind a glass window as shocked spectators, including Superman actor Dean Cain and reality star Teresa Giudice, partied outside.

Bikini model Kourtney Reppert, 33, from Los Angeles, decided to undergo a $9,800 bum lift in front of 200 guests at a glamorous Beverley Hills event on Thursday night

The Sculptra Butt Lift was carried out by staff at the Beverly Hills Rejuvenation Center in front of hundreds of spectators

The model, who bared her rear behind a glass window, said she decided to undergo the cosmetic procedure to confidently display her post-pregnancy body

The model and actress, who has more than 1.5million followers on Instagram, explained that the non-surgical lift would bring back the collagen she had lost over the years.

Speaking to The Sun Kourtney said: 'It's going to look just perfect for a beach photo shoot or whatever.'

Kourtney, who admitted that she was initially embarrassed to expose her intimate area in front of the hundreds of spectators attending the party, said she felt the lift had been successful and worthwhile.

She continued: 'I feel that after having a child, it's hard enough for women to have these body issues and these expectations in society to be perfect.

'But then when we try to attain that we get attacked or people say, ''Do it the natural way'' or whatever. And sometimes you just can't do it the natural way. You need a little bit of an extra hand.'

The model and actress, who has more than 1.5million followers on Instagram, said the procedure would help increase the collagen in her rear

Kourtney admitted that she was initially embarrassed to expose her bum in front of the hundreds of spectators

The mother-of-one had been contemplating the procedure for years after losing around 45kg after the birth to her son five years ago

The model, who lost around 99lbs after the birth to her son five years ago, said she had been contemplating a bum lift for years before finally deciding to take the plunge.

Despite being a fan of cosmetic procedures however she also stressed that maintaining a healthy diet and exercising were important to her.

Now with a fuller rear, Kourtney believes her new look will help her in her modelling career and will allow her to achieve the shape she has always wanted.

The Sculptra procedure carried out by the Los Angeles-based clinic involves stimulating collagen growth using micro-invasive injections just below the skin.

She said that while she was a fan of cosmetic procedure she also felt it was important to maintain a healthy diet and exercise

During the non-surgical procedure, the area is numbed with a topical anesthetic before a large cannula is inserted into targeted areas of the buttocks.

According to the clinic's website, the lift is a alternative option to those who 'desire a fuller and shapelier buttocks enhancement but have been unable to achieve it because there is not enough fat.'

The cost of four vials is $2,995 while those looking to have 20 vials injected can expect to pay $12,000.