Kourtney Kardashian flashes her underwear in sheer top as Khloe looks leggy in a tiny LBD on family outing at The Weeknd gig

While Kim Kardashian may be out of action days after welcoming her second child, the rest of the female family members were keen to wet the baby's head.

Khloe and Kourtney led Wednesday night's festivities as the group headed to The Weeknd's Los Angeles concert at The Forum with mum Kris, Kendall and Kylie.

Khloe, 31, looked sensational in a curve-hugging dress, rivalling her Victoria's Secret model sister with her long legs peeping through a side split.

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Leggy lady! Khloe Kardashian looked incredible as she led the way with her famous family as they went along to The Forum in California on Wednesday night to see The Weeknd

With her Louboutins on, Khloe made long strides to -and later from - the venue beside her 5ft 9in sister who similarly tipped the look with heels.

Khloe, impeccably tressed with her hair in loose waves, was keeping her sister entertained as they approached the venue and hinted at her vivacious mood as she giggled.

The sisters were both wearing black, though they certainly didn't hide in the shadows with their scene-stealing ensembles. 

See more Khloe Kardashian news and style as she goes to The Weeknd's concert

Busty display indeed! Kourtney Kardashian wowed as she showed off her slender curves in a revealing sheer black lace top and slim-fitting trousers

Rear-ly nice: Khloe, 31, made the most of her ample derriere and gym-honed legs in her daringly-cut black dress

Careful! The reality TV star almost showed too much as she climbed the steps with a pal after the show

Legs for days: Khloe showed how hard she has been working in the gym in recent months, the tone on her thighs seriously enviable

Celebrating: Khloe was also joined by her younger sister Kendall Jenner, who looked chic in skintight leather trousers and boots

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Party time: Khloe was looking stunning in a black dress that hugged to her curves perfectly

Kourtney, 36, displayed her very ample cleavage as she rocked a skintight sheer black lace top, showing off her bra underneath.

The slender star, the eldest of the Kardashian-Jenner clan, continued to flaunt her amazing figure as she teamed the racy top with a pair of slim-fitting bottoms, cropped at the ankle to show off her classic black heels.

Her raven tresses were slicked back and a bright scarlet red lipstick added to her perfect pout. 

Girls' night: Khloe and Kendall were joined by another gal pal as Kylie and Kris attended with them

She's well red: Kourtney, 36, made for a seriously elegant additon to proceedings with her scarlet red lip shade

Perfect pins: After the show, she once again flaunted her lovely legs in her flattering trousers as she made to leave

Victoria's Secret Angel Kendall, 20, was lithe in leather-look trousers, over-the-knee boots and a a fur-trim waistcoat.

She was later seen joined by her best pal model Cara Delevingne, who was her typically laid-back self in a pair of skinny jeans with a zipped-up jacket, her blonde locks tied up in a utilitarian ponytail. 

And, somewhat surprisingly, 18-year-old Kylie switched her usual glam look for something far more casual, rocking a taupe knitted mini dress teamed with trainers and her hair scraped up into a topknot. 

CaKe reunited! Cara Delevingne was also there, looking in great spirits as she left with her best friend Kendall

Casual Cara: The British supermodel opted for the most laid-back look of the bunch, drawing attention to her funky socks

The famous family were supporting a pal in The Weeknd's Abel Makkonen Tesfaye since he is dating one of Kendall's best friends, Bella Hadid.

Even glamorous gran Kris was making a special effort to look the part, donning her rockiest ripped jeans and a pair of heavy-duty boots. 

The family were no doubt celebrating expanding their family this weekend because Kim had just welcomed a son, Saint West, with husband Kanye.

Kendall flew back to the States especially to make a visit to the new addition after working in London over the weekend.

And proving to have put her visit bid in early, Khloe said her nephew was 'so cute' on Saturday, not long after the birth.

Rock and roll gran: New gran Kris Jenner was accompanying the troops on wetting the baby's head after daughter Kim Kardashian expanded the family with a son on Saturday

Hell for leather: Kendall wore leather-look trousers to highlight her lithe figure

Gig goers: The girls made quite the entrance into the venue, arm-in-arm

Family outing: Though they weren't pictured together, Kourtney Kardashian (second left) later shared an image with fellow attendees Kylie Jenner (right) and Khloe (centre)

Party girls: The group seemed to be in high spirits, with a smiley Khloe leading the group

Chatting away: She was deep in conversation, hinting at her happy mood

Cute twosome: The leggy duo flaunted their close bond as they linked up on entry

Quite an arrival: Putting their best feet forward, the girls made quite an entrance

'My little nephew was born,' she said. 'He is so cute and so perfect. I love him and mommy and daddy are doing fantastic.'

She also joked about paying another visit to the hospital owing to her vigil for estranged husband Lamar Odom, who was admitted a couple of months ago following a drug-fuelled binge in Las Vegas. 

She tweeted: 'I know these hospital halls way too well. Hoping from one room to another.' 

Out to play: New mum Kim was noticeably absent from the group outing

Rock and roll: Kris was kitted out in her best rocky jeans and heavy-duty boots

Smiling: She looked proud to have recently expanded her family with another boy

Going low-key: Kylie Jenner often likes to steal the limelight, but on Wednesday she was the most laid-back of the family as she shunned the spotlight in her casual gear