Pucker up! North West gets to wear aunt Kylie Jenner's black lipstick as she attends King Cairo's birthday bash

As the niece to Kylie Jenner, founder of her own Lip Kit enterprise, it's no wonder she's curious about cosmetics.

And North West, aged three, got the chance to have her 19-year-old aunt apply a dark coat of lipstick.

The two were attending a birthday party thrown by Kylie and her rapper beau Tyga for his son, King Cairo, who turned four on Sunday.

Scroll down for video 

Pucker up! North West, aged three, wore a dark coat of lipstick as she attended a birthday party for King Cairo's fourth birthday on Sunday

Pucker up! North West, aged three, wore a dark coat of lipstick as she attended a birthday party for King Cairo's fourth birthday on Sunday

'Okay, you want black, yes?' the Keeping Up With the Kardashians star asked the daughter of her sister Kim Kardashian, 35, and husband Kanye West, 39.

As the precious little girl squealed with excitement, Kylie agreed and took a snapshot of North in the black gloss.

She humourously captioned the photo: 'What happens at auntie Kylie's stays at auntie Kylie's.'

'Okay, you want black, yes?': North's auntie Kylie Jenner, 19, applied black lipstick to the daughter of sister Kim Kardashian and husband Kanye West

'Okay, you want black, yes?': North's auntie Kylie Jenner, 19, applied black lipstick to the daughter of sister Kim Kardashian and husband Kanye West

'Oh my God, Northy!': The little girl delighted while gliding down backwards on a huge, bright red bouncy slide, with Ferrari logo flags hanging from above

'Oh my God, Northy!': The little girl delighted while gliding down backwards on a huge, bright red bouncy slide, with Ferrari logo flags hanging from above

Precious! North looked adorable in a blush-coloured dress layered over a white tee and her raven locks in high pigtail buns

Precious! North looked adorable in a blush-coloured dress layered over a white tee and her raven locks in high pigtail buns

North looked precious in a blush-coloured dress layered over a white tee and her raven locks in high pigtail buns.

After a mini makeover, North headed for an afternoon of fun at a Ferrari-themed birthday party thrown by Kylie and Tyga for his son with ex, Blac Chyna, 28. 

There was a balloon Ferrari floating in the pool, an enormous replica Ferrari racing track for remote-controlled cars - Ferraris, obviously.

'World's best dad': Kylie and her rapper beau Tyga threw a Ferrari-themed birthday party for his son, King Cairo, who turned four on Sunday

'World's best dad': Kylie and her rapper beau Tyga threw a Ferrari-themed birthday party for his son, King Cairo, who turned four on Sunday

Riding high! There was a balloon Ferrari floating in the pool, an enormous replica Ferrari racing track for remote-controlled cars - Ferraris, obviously 

Riding high! There was a balloon Ferrari floating in the pool, an enormous replica Ferrari racing track for remote-controlled cars - Ferraris, obviously 

There were Ferrari inflatable slides, a bungee trampoline, Ferrari horses and of course, the birthday cake was Ferrari-themed too.

And North was not shy as she anxiously waited first in line to grab a slice from the double-tiered cake.

She also delighted while gliding down backwards on a huge, bright red bouncy slide, with Ferrari logo flags hanging from above.

Decked out! There were Ferrari inflatable slides, a bungee trampoline, Ferrari horses and of course, the birthday cake was Ferrari-themed too

Decked out! There were Ferrari inflatable slides, a bungee trampoline, Ferrari horses and of course, the birthday cake was Ferrari-themed too

Let them eat cake! North was not shy as she anxiously waited first in line to grab a slice from the double-tiered delight

Let them eat cake! North was not shy as she anxiously waited first in line to grab a slice from the double-tiered delight

Have a cool kid in North West's classic Vans

With Kim Kardashian and Kanye West as her parents it was a given that North West would have a mini wardrobe to match her stylish mom and dad's.

And we love that the three year old cutie is currently eschewing super girly froth and frills in favor of something a little bit more street. Take a look at the sweet outfit she wore to the birthday party of Tyga's son King.

Who knew a toddler could carry off a 1990's style slip dress and tee? But then mini versions of things usually are adorable and this ensemble was just that. And oh my gosh did you see the teeny tiny sneakers?

These classic checkerboard Vans are the coolest and in our opinion every little girl should own a pair. So if you fancy giving your princess a skater make over then click (right) to buy some now.

Or head to our edit below for more dear little styles for your little dude.

* PRICES MAY NOT BE AS ADVERTISED

North's parents were likely not in attendance as the party came on the heels of Kim's attack earlier this month where she was robbed at gunpoint by five men in a $11 million heist during Paris Fashion Week. 

Meanwhile Snapchat queen Kylie documented the special day on the popular social media mobile app.

'He did such a good job,' she captioned one shot of her beau. 'Worlds best dad.' 

Circus act! Tyga and Kylie made sure to not miss a single detail for Cairo's fourth birthday

Circus act! Tyga and Kylie made sure to not miss a single detail for Cairo's fourth birthday

The day before Cairo's mom, Blac Chyna also threw a party for the former couple's son in a similar-themed Lego Ferrari party.

Tyga and his baby momma are obviously not comfortable enough around each other to consolidate the festivities into a singular Ferrari-themed day.

This is despite the fact that Cairo's mom is about to have a baby for his dad's girlfriend's brother Rob, making Blac both his mother and his auntie. 

'He did such a good job': Kylie gushed over her beau's efforts in putting together the birthday party for his son

'He did such a good job': Kylie gushed over her beau's efforts in putting together the birthday party for his son

The comments below have not been moderated.

The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.

By posting your comment you agree to our house rules.

Who is this week's top commenter? Find out now