Slam dunk! Kourtney Kardashian reveals slimmer figure in tight jeans as she poses with male friend six months after welcoming baby Reign 

By Heidi Parker For Dailymail.com

Published: 11:25 EST, 9 June 2015 | Updated: 12:48 EST, 9 June 2015

She welcomed her third child with partner Scott Disick in December and already Kourtney Kardashian is looking back into bikini shape.

While helping Kanye West ring in his 38th birthday at the Staples Center in LA on Monday night, the 36-year-old beauty showed off her trimmer figure in an Instagram snap.

The Keeping Up With The Kardashians star had on skintight jeans and what appeared to be sexy boots as she posed with a male friend who held a basketball.

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Hot mama: Kourtney Kardashian showed off a trimmer figure as she wore tight jeans and a cropped leather jacket when posing with a friend at Kanye West's 38th birthday party at Staples Center in LA on Monday

Hot mama: Kourtney Kardashian showed off a trimmer figure as she wore tight jeans and a cropped leather jacket when posing with a friend at Kanye West's 38th birthday party at Staples Center in LA on Monday

The eldest child of Kris Jenner, 59, was going out of her way to show off her hard-won curves.

In addition to the washed tight jeans and black lace-up shin cover that was made to look like a knee-high boot, the beauty wore a black tank top and a cropped leather jacket. Pointy black heels added even more of a Nineties touch.

The E! star looked more rock star groupie than soccer mom.

To the gym: The 36-year-old has been outspoken about her struggle to shed the pounds after welcoming Reign in December; here she is pictured in the entrance way to her Calabasas mansion

To the gym: The 36-year-old has been outspoken about her struggle to shed the pounds after welcoming Reign in December; here she is pictured in the entrance way to her Calabasas mansion

Zip up after the gym in a Nike hoodie

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Just because it's the gym dosn't mean we can slack on our sartorial choices. (We're looking at you, dingy old hoodie from high school.)

So thanks to Kourtney, allow us to introduce you to this stylish Nike Tech Fleece Hoodie. We love the contrast trim and the unique detail cut around the cuffs, not to mention the high- neck.

This jacket is perfect to throw on for your morning coffee run, or casual day of errands. Pair it with a pair of black skinny jeans or wear it like Kourtney with leggings to the gym.

Something about the bold- graphic contrast between the black zippers and trim that we love. And the white color is a nice departure from the typical black on black gym ensemble.

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Kourtney has been outspoken about her struggle to shed the pounds after welcoming Reign in December.

The sister of Kim, 34, and Khloe, 30, has said that she has needed to work out extra hard and stick to a clean diet.

Often the petite small-screen wonder has been seen posting shots on social media where she is on her way to an exercise session or waist training.

A battle: The E! star, pictured here in early June in partner Scott Disick's shirt, has said she has been working out almost daily

A battle: The E! star, pictured here in early June in partner Scott Disick's shirt, has said she has been working out almost daily

The reality star has shown off a very small waistline while wearing her waist training in numerous shots.

In early June she said she was heading to the gym to get a bottom that looks like younger sister Khloe's.

'Today's mission: to get my butt looking like@khloekardashian 's!!' she wrote in a caption next to a photo where she was in workout gear.

Whatever it takes: The reality star has shown off a very small waistline while wearing her waist training

Whatever it takes: The reality star has shown off a very small waistline while wearing her waist training

Kourtney revealed to Harper's Bazaar in May that getting her body back has been a slow process.

'I like to take my time and not try to put too much pressure on myself, but it's hard,' she admitted. 'I think I forget every time— you give birth and you want your stomach to be flat again.

'It does take a lot of work, but I usually start slowly by going on walks with the baby. At certain times I take all three kids on a walk, and I have this stroller that they can all ride in and on. So I start slowly—but now I'm in full force.

The old Kourtney: The daughter of Kris Jenner almost a decade ago when she was sunbathing in Las Vegas

The old Kourtney: The daughter of Kris Jenner almost a decade ago when she was sunbathing in Las Vegas

'I've been working out with a trainer, and having somebody else to work out with really helps motivate me,' the Calabasas native added.

'Some days Khloe will join me, or I have a girlfriend I've been working out with—just setting that trainer session and knowing I'm not going to flake. I also try to eat really clean and at home as much as I can.'

On April 27th, she shared an Instagram photo of her weight, revealing she was at 116 pounds.

Still hanging on: Thought they have had their ups and downs, Kourtney and Scott have stuck it out; here they are pictured in Calabasas on Thursday

Still hanging on: Thought they have had their ups and downs, Kourtney and Scott have stuck it out; here they are pictured in Calabasas on Thursday

Kourtney captioned it: 'it's Monday! Ps: I'm 5 feet tall, so everyone relax I'm on a workout kick, trying to bring some Monday motivation' 

Meanwhile, there's been a lot going on with the Kardashian-Jenner family lately, with Caitlyn Jenner making her public debut as a woman and Kim Kardashian announcing her second pregnancy.

On the cover of Vanity Fair, Caitlyn, formerly known as Bruce, is wearing a silky white basque, which reveal the results of her recent 36D breast implant surgery.

Kourtney expressed her support of the 65-year-old former Olympian, captioning an Instagram image of Caitlyn's cover: 'Freedom! Stunning. #Caitlyn' 

Also at the event... : Kim Kardashian posed with birthday boy West as well as four Lakers girls

Also at the event... : Kim Kardashian posed with birthday boy West as well as four Lakers girls

 

 

 

 

 

 

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