Justin Bieber's lady loves of past and present collide as Kourtney Kardashian and Hailey Baldwin are seen heading into West Hollywood hot spot together 

He reportedly dated Kourtney Kardashian, 36, in the fall.

And this holiday season he romanced model Hailey Baldwin, 19, while in St Barts.

So it was odd to see Justin Bieber's two ladies party together on Monday night at The Nice Guy in West Hollywood.

See Justin Bieber updates as Kourtney Kardashian and Hailey Baldwin cross paths 

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Biebs' babes on the town: Kourtney Kardashian and Hailey Baldwin, who have both been romantically linked to Justin Bieber, partied together on Monday night at The Nice Guy in West Hollywood

Biebs' babes on the town: Kourtney Kardashian and Hailey Baldwin, who have both been romantically linked to Justin Bieber, partied together on Monday night at The Nice Guy in West Hollywood

Girl free: The Sorry singer was solo on Sunday afternoon in Beverly Hills

Girl free: The Sorry singer was solo on Sunday afternoon in Beverly Hills

The E! star clearly wanted to upstage the Sorry's singer's current darling as she wore a see-through top that exposed her bra.

Baldwin showed off her legs in a mini skirt.

Both looked as if they were ready to have some fun. The chart topper was not seen, but Kendall Jenner and Pia Mia were there too.

Sexy style: Kardashian stood out in sheer black top and exposing her bra

Sexy style: Kardashian stood out in sheer black top and exposing her bra

As well as flaunting her cleavage, toned stomach and slim waistline under the transparent t-shirt, Kourtney drew attention to her petite frame with her stylish flared trousers.

The mother-of-three covered her legs with a pair of low-slung black flared bottoms while wearing a slick blazer caped over her shoulders.  

Kourtney added a touch of 90s glam thanks to a choker necklace and wore her hair scraped back in a high ponytail.

Retro touch: Kourtney set off her look with a 90s style choker necklace and a leather clutch bag

Look suave in a Saint Laurent tuxedo blazer like Kourtney

Kourtney Kardashian was spotted look very dapper as she headed for dinner in LA wearing wide leg trousers teamed with a sheer top and Saint Laurent tuxedo blazer. Kourtney then accessorized her look with a black choker, pointed heels and a navy leather clutch bag for a look that definitely meant business!

One of the most iconic of Saint Laurent's designs, if not the twentieth century, the 'Le Smoking' tuxedo jacket was first designed in 1966. At the time it was a pioneering move that made way for women to wear trouser suits and the power dressing movement.

A great investment, it's safe to say if this jacket has stood the test of time for the last fifty years, it should see you through the next couple of seasons!

Head over to MATCHESFASHION.com to buy it in the sale now (click right). But if the real deal is a bit out of your budget, fear not! Because it couldn't be easier to emulate the look for less with one of the picks from our edit below!

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Business chic: Kourtney, 36, was rocking a smart blazer and matching trousers, upping the sex appeal with a semi-sheer T-shirt
Business chic: Kourtney, 36, was rocking a smart blazer and matching trousers, upping the sex appeal with a semi-sheer T-shirt 

Business chic: Kourtney, 36, was rocking a smart blazer and matching trousers, upping the sex appeal with the semi-sheer T-shirt 

If she was feeling at all fatigued from her previous night out, she didn't show it as she looked as dewy and fresh-faced as ever, with little more than a heavy smoky eye for the evening.

On Sunday, Kourtney had accompanied her youngest sister - Kylie Jenner - to a Golden Globes party on Sunday. 

Meanwhile, her second-youngest sister Kendall, 20, looked typically sensational as she stepped out alongside her on Monday for dinner. 

Lingerie: She revealed more than just a hint of her decorative bra as she made her way to the restaurant

Lingerie: She revealed more than just a hint of her decorative bra as she made her way to the restaurant

Kendall, who is rumoured to be dating One Direction's Harry Styles, turned heads in a stylish grey crop top that flaunted her perfectly flat stomach and tiny waist. 

Her lean figure was accentuated by the rib-tickling length of the cosy knitwear and its elasticated hemline, her pancake-flat stomach and whittled waistline stealing the show.

The reality TV star-turned-model dressed up the look with a pair of smart black trousers - with a flattering low-slung waistband across her tiny hips - and cute snakeskin print stilettos. 

Amazing abs: Kendall Jenner, 20, showcased her perfectly flat stomach as she accompanied Kourtney on Monday

Amazing abs: Kendall Jenner, 20, showcased her perfectly flat stomach as she accompanied Kourtney on Monday

Model behaviour: Kendall looked runway ready, showcasing her tiny waist in her grey top and black cropped trousers 

Model behaviour: Kendall looked runway ready, showcasing her tiny waist in her grey top and black cropped trousers 

She completed her simple but effective smart-casual look with a small black bag with a cute pom-pom attached. 

She wore her dark locks down loose and stayed true to form by wearing minimal make-up, a look that makes her stand apart from her more cosmetic-loving sisters. 

Hailey, 19, opted for an equally daring look, donning a tiny, thigh-skimming dress with a very short hemline.

Legs for days: Joining the siblings was model and close friend Hailey Baldwin, who is fresh from her romantic Mexican holiday with Justin Bieber 

Legs for days: Joining the siblings was model and close friend Hailey Baldwin, who is fresh from her romantic Mexican holiday with Justin Bieber 

Sneaky treat: Kourtney shared a snap on her Instagram later in the evening showing her chowing down on a snack along with a squirrel emoji

Sneaky treat: Kourtney shared a snap on her Instagram later in the evening showing her chowing down on a snack along with a squirrel emoji

Justin Bieber's new squeeze wore her blonde tresses down in pretty curls and set off the look with a pair of simple heels.

The starlet has just returned from a holiday to Mexico with the singer, where Bieber's bad behaviour sensationally saw him booted off the site of some ancient Mayan ruins.

Last week, the 21-year-old was reportedly asked to leave the archaeological site of Tulum after he arrived carrying open beer cans, climbed on some of the protected structures and 'mooned' other tourists.

Letting her hair down! Singer Pia Mia was also seen enjoying a night out at the celebrity hot spot 

Letting her hair down! Singer Pia Mia was also seen enjoying a night out at the celebrity hot spot 


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