Kylie Jenner's best friend Anastasia Karanikolaou nearly spills out of her black leotard as she puts on a busty display for her 20th birthday party

She's always hanging out with her best friend Kylie Jenner.

Yet Anastasia Karanikolaou made sure she stayed in the spotlight on Friday night as she put on a very busty display for her 20th birthday party in West Hollywood, California

The model, 20, left nothing to the imagination as she struggled to fit into a tiny and plunging black leotard.

Revealing: Anastasia Karanikolaou made sure she stayed in the spotlight on Friday night as she put on a very busty display for her 20th birthday party in West Hollywood, California

Revealing: Anastasia Karanikolaou made sure she stayed in the spotlight on Friday night as she put on a very busty display for her 20th birthday party in West Hollywood, California

Showing off her peachy posterior, she teamed the item of clothing with a pair of sheer black flares, which had sequined strips coming off them. 

Anastasia accessorised her look with a pair of silver diamond hoops and a set of black high heels. 

The social media sensation, who has an impressive 3 million followers, styled her platinum blonde locks into textured and tousled hairdo.

Daring: The model, 20, left nothing to the imagination as she struggled to fit into a tiny and plunging black leotard

Daring: The model, 20, left nothing to the imagination as she struggled to fit into a tiny and plunging black leotard

Peachy: Showing off her peachy posterior, she teamed the item of clothing with a pair of sheer black flares, which had sequined strips coming off them

Peachy: Showing off her peachy posterior, she teamed the item of clothing with a pair of sheer black flares, which had sequined strips coming off them

She added a full face of glamorous birthday make-up, which included metallic eyeshadow, bronzer and pink glossy lips.

In the past, Anastasia has been open about her plastic surgery procedures and last year she told Harper's Bazaar about her breast lift.

Talking about her reason for the surgery, she told the publication: 'I used to have the cutest, perkiest boobs when I was young. 

BFFs: She's always hanging out with her best friend Kylie Jenner

BFFs: She's always hanging out with her best friend Kylie Jenner

Cute: Anastasia pictured with Kylie at her baby shower for her daughter Stormi Webster born in February 

Cute: Anastasia pictured with Kylie at her baby shower for her daughter Stormi Webster born in February 

'Someone had told me that if you wear an underwire bra it makes your boobs sag. I had cute boobs so I would never wear a bra. Overtime, I found out that whoever told me that was wrong.'

She added: 'I was very open to sharing — plastic surgery is nothing be ashamed of.' 

Also attending her birthday party were singers Madison Beer and Justine Skye.

Low profile: Madison Beer, 19, cut a casual figure for the star-studded event as she wore an off-the-shoulder leopard print cardigan dress, which teased a glimpse of her cleavage

Low profile: Madison Beer, 19, cut a casual figure for the star-studded event as she wore an off-the-shoulder leopard print cardigan dress, which teased a glimpse of her cleavage

Shy?: Hiding her face in her hands as she left the party, she completed her look with a pair of white Dr. Martens boots

Shy?: Hiding her face in her hands as she left the party, she completed her look with a pair of white Dr. Martens boots

Stylish: She accessorised her look with an array of silver and gold jewellery 

Stylish: She accessorised her look with an array of silver and gold jewellery 

Madison, 19, cut a casual figure for the star-studded event as she wore an off-the-shoulder leopard print cardigan dress, which teased a glimpse of her cleavage.

Hiding her face in her hands as she left the party, she completed her look with a pair of white Dr. Martens boots. 

Meanwhile, Justine, 22, looked effortlessly chic in a Moschino trouser suit, which she daringly decided to go braless and topless underneath.

She accessorised her look with a pair of barely-there red heels and a matching clutch bag.

Justine styled her lilac locks into a sleek low ponytail as she added a black hairband to complete her look.  

Wow: Meanwhile, Justine, 22, looked effortlessly chic in a Moschino trouser suit, which she daringly decided to go braless and topless underneath

Wow: Meanwhile, Justine, 22, looked effortlessly chic in a Moschino trouser suit, which she daringly decided to go braless and topless underneath

Chic: Justine styled her lilac locks into a sleek low ponytail as she added a black hairband to complete her look

Chic: Justine styled her lilac locks into a sleek low ponytail as she added a black hairband to complete her look

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Kylie Jenner's BFF Anastasia Karanikolaou spills out of leotard

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