Kourtney Kardashian applies generous amounts of make-up and keeps a stiff upper lip over ex Scott Disick and his mystery blonde

Her ex and father of her three children, Scott Disick, was spotted partying all night with a mystery blonde.

And instead of sulking at home about it, Kourtney Kardashian decided to paint on plenty of make-up and put on her most stylish outfit for her latest outing.

The 36-year-old reality star didn't seem to let the troubling news get to her as she was done up to the nines while running errands in Los Angeles on Thursday.

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Out and about: Kourtney Kardashian was all done up while out and about in Los Angeles on Thursday

Out and about: Kourtney Kardashian was all done up while out and about in Los Angeles on Thursday

Kourtney went casual cool for the outing as she wore a black vest tucked into large high-waisted striped shorts and strappy black heels.

She did not skimp out on the cosmetics as she wore plenty of make-up on her face topped off with a swipe of bright red lipstick.

The older sister of KIm Kardashian had her raven-coloured locks back in a ponytail as she accessorised with a silver bracelet and black leather clutch.

Painting it on: The 36-year-old reality star wore plenty of make-up on the outing

Painting it on: The 36-year-old reality star wore plenty of make-up on the outing

Keeping it cool: She wore a clinging black top tucked into large high-waisted striped trousers
Keeping it cool: She wore a clinging black top tucked into large high-waisted striped trousers

Keeping it cool: She wore a clinging black top tucked into large high-waisted striped trousers

Showing her style: Along with the fashionable look, she sported strappy black leather heels

Showing her style: Along with the fashionable look, she sported strappy black leather heels

Kourtney looked in fantastic shape for being a mother-of-three as she confidently strutted around in the clinging top while out and about in Southern California.

The solo outing comes just hours after her 32-year-old ex Scott was spotted partying all day and all night long with a pretty blonde woman in New York City on Wednesday. 

 According to TMZ, they finally emerged together at 6am on Thursday morning after staying up all night.

Painting the town red: Her heavy make-up was topped off by a swipe of bright red lip

Painting the town red: Her heavy make-up was topped off by a swipe of bright red lip

Looking good: She looked to be in fantastic shape for having three children
Looking good: She looked to be in fantastic shape for having three children

Looking good: She looked to be in fantastic shape for having three children

Scott's party antics are said to have contributed to his split from Kourtney, who he shares five-year-old Mason, three-year-old Penelope, and nine-month-old Reign with.

The reality star and the unknown woman were seen leaving Trump Soho together on Wednesday afternoon.

They then visited a bar in the Big Apple's East Village area, where Scott was spotted knocking back pints of beer.

Moving on: She looked in good spirits despite her longtime boyfriend Scott Disick being spotted out all night with a mystery woman just hours earlier

Moving on: She looked in good spirits despite her longtime boyfriend Scott Disick being spotted out all night with a mystery woman just hours earlier

Busy day: She hopped into her black luxury vehicle as she continued to run errands around the city

Busy day: She hopped into her black luxury vehicle as she continued to run errands around the city

The blonde kept close to him at all times, and they were seen laughing and joking around together.

The pair then kept the party going at a friend's house, before stopping by 1OAK nightclub and finishing up their wild night at Soho House, before emerging at dawn.

The couple split in July after nine years together, when photos emerged of Scott looking very cosy with rumoured ex Chloe Bartoli.

Fashion forward: The Keeping Up With The Kardashians star accessorised with silver bracelets and a black leather clutch

Fashion forward: The Keeping Up With The Kardashians star accessorised with silver bracelets and a black leather clutch

Keeping it moving: Kourtney appeared to be all business as she arrived at what looked like an office building

Keeping it moving: Kourtney appeared to be all business as she arrived at what looked like an office building

Hot mama: She had her raven-coloured locks tied back in a tight ponytail

Hot mama: She had her raven-coloured locks tied back in a tight ponytail

Just a few days ago, Scott was seen sipping cocktails in Atlantic City, New Jersey while partying with pals.

The star was recently asked by Us Weekly how he plans to continue earning a high income after splitting from Kourtney - especially since he will no longer appear on Keeping Up With The Kardashians.

'I’ve been making money since I was a kid, and I’ll keep making money,' he said confidently. 'So I am not worried about it. I am feeling good.' 

Party time: Hours earlier the father of her three children, Scott, stayed up all night getting very friendly with a mystery blonde woman on Wednesday through Thursday morning

Party time: Hours earlier the father of her three children, Scott, stayed up all night getting very friendly with a mystery blonde woman on Wednesday through Thursday morning

Bottoms up: Scott was seen knocking back pints of beer when they visited a bar in the East Village

Bottoms up: Scott was seen knocking back pints of beer when they visited a bar in the East Village

We like to party: Scott and the unknown woman visited a house party, eventually ending the night at 6am

We like to party: Scott and the unknown woman visited a house party, eventually ending the night at 6am

Friendly: The young woman stayed close to Scott's side at all times during their wild night together

Friendly: The young woman stayed close to Scott's side at all times during their wild night together

Dressed to impress: The leggy blonde was clad in a beige dress, cream cardigan and blue boots

Dressed to impress: The leggy blonde was clad in a beige dress, cream cardigan and blue boots

In a preview clip for Keeping Up With The Kardashians' 11th season, Kourtney - who is currently in Los Angeles with the children - can be seen breaking down in tears as she learns of Scott's tryst with Chloe.

After seeing the photos on DailyMail.com, the 36-year-old said sadly: 'I've worked so hard to keep this family together.'

No longer Lord of the manor: Kourtney split from long-term lover Scott earlier this year  after photos emerged of him romping with another woman

No longer Lord of the manor: Kourtney split from long-term lover Scott earlier this year  after photos emerged of him romping with another woman

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