Scott Disick skipped North West's star-studded birthday bash in favour of a wild night out.
The 'Keeping Up with the Kardashians' star opted to stay in Southampton, New York to enjoy a belated celebration for himself on Saturday (20.06.14), after turning 31 on May 26, instead of flying to Los Angeles with his pregnant girlfriend, Kourtney Kardashian, and their children, Mason, four, and Penelope, 23 months, to host a party for her niece in the backyard of their home in Calabasas, California.
Scott reportedly arrived at 1Oak nightclub in his Bentley with a huge entourage in tow shortly after midnight and wasted no time letting his hair down, according to Paul Micheli of DJ Prep.
He told gossip website RadarOnline.com: "He started smoking cigarettes and drinking beer. He seemed pretty wasted."
The reality TV star, who calls himself "Lord Disick," was presented with a crown-shaped cake by the club, as 2 Chainz hit 'Birthday Song' was playing at around 1.15 a.m.
Meanwhile, North and her parents, Kanye West and Kim Kardashian, were joined by a number of famous pals, including Ciara and her one-month-old son, Future, and fashion designer Rachel Roy, at a Coachella-inspired "Kidchella" party at Kourtney and Scott's $8.45 million mansion, which they purchased earlier this year.
The couple spared no expense for the celebration, which took place almost one week after North's actual birthday last Sunday (15.06.14).

Olivia Wilde claims she felt under a lot of pressure to be successful.
The 'Drinking Buddies' star, who has two-month-old son Otis with fiancé Jason Sudeikis, wishes she had been more relaxed about her career when she was younger.
The 30-year-old actress said: "There is this idea in Hollywood you have to have had a huge success by the age of 25, and that's obviously ludicrous."
She added: "It affects us all . . . You think, 'I have to be successful by the time I'm 30 or I'm a failure.' That's not true . . . I wish at 18 I would have thought, 'It's OK, I can make one thing a year. I don't have to make 12 projects.' "
Asked what advice she would give to her younger self, the brunette beauty told the New York Post's Page Six: "Chill out, calm down, you have time."
Olivia recently credited her first child for changing her perspective about acting and fame.
She said: "The amazing thing about becoming a mother is it snaps everything into focus and really makes you understand what's important.
"It's [parenthood is] tricky! It's tricky for every mother, and I salute working mothers everywhere. We are warriors. Suddenly these press lines are less stressful!"

Kendra Wilkinson has brushed off rumours of a rift with Hank Baskett.
The 'Kendra on Top' star's husband was reportedly spotted looking "downtrodden" as he moved into a motel near their home in Calabasas, California on Friday (20.06.14), sparking speculation they had a major bust up, but they reunited to attend a child's birthday party on Saturday (21.06.14).
The former Playboy model - who has four-year-old son Hank Jr. and one-month-old daughter Alijah with Hank - looked stoic as she arrived at the bash, according to gossip website RadarOnline.com.
But the 29-year-old beauty hinted on Twitter that her marriage is fine, tweeting: "Fun day with both of my Hanks #lovingsummer (sic)"
An eyewitness previously claimed that former NFL star Hank, 31, checked in a motel on Friday evening after speeding away from their mansion in his white Jeep.
The source said: "Hank was wearing a royal blue NBA shirt and long khaki shorts. He got out of the Jeep with a woman who appeared to possibly be one of the couples' baby nurses because she was wearing a medical type uniform.
"They went into the office of the motel and then pulled the jeep around to the other side where their room was located. Hank appeared disoriented and downtrodden. At one point, he kicked the ground."
Hank spent most of Friday with his father at a Major League Gaming Competition in Anaheim, California, but his wife hasn't spoken to her family since October.
Her mother Patti Wilkinson recently claimed fame had ruined her daughter.

Elizabeth Hurley gives Elton John and David Furnish parenting tips.
The 49-year-old actress - who has 12-year-old son Damian with her ex-boyfriend Stephen Bing - encouraged the couple to hire "a new nanny of the highest calibre" to help them care for their two sons, Zachary, three, and 17-month-old Elijah, when they're busy.
David, 51, told the MailOnline: "Elton and I have to travel a great deal, so we've hired a new nanny of the highest calibre to look after the boys. Liz says children thrive on routine and emphasised this to us by saying as long as they stick to a programme, they are fine."
He added: "Liz said that when Damian was small, she'd have to go to New York for 48 hours for shoots and she'd leave him at home with a nanny because it was kinder than upsetting his sleep patterns."
'Rocket Man' hitmaker Elton, 67, is Damian's godfather.
Meanwhile, the couple have already enrolled their eldest son at a smart feeder school for Eton College, as they hope to send him to the prestigious £34,000-a-year English boarding school in the future.
David explained: "It is close to our Windsor home and all the Old Etonians I've met are the sort of men who can go anywhere and converse with anyone.
"They are not at all snobbish, and they are wonderfully talented - which is definitely what we want for Zachary and Elijah."

Lauren Conrad stormed out of a restaurant in Mexico in support of same sex couples.
The former 'The Hills' star - who is celebrating her bachelorette party in Cabo San Lucas this weekend ahead of her upcoming nuptials to William Tell - lashed out at beachside eatery The Office on Twitter, accusing it of enforcing homophobic policies, but the manager insists it was "a huge misunderstanding."
After a night out on Thursday (19.06.14), the 28-year-old beauty tweeted: "The Office in Cabo does not allow same sex couples to participate in couple games. Had to walk out. #equality #StopTheHate (sic)."
Her best pal and former co-star Lo Bosworth also tweeted: "If you support #equalityforall don't eat at The Office in Cabo San Lucas (sic)."
But the restaurant's manager Carmen Alucano told PEOPLE.com that the incident was "a huge misunderstanding" and apologised for a "joke" the DJ made while the girls were playing a game in which couples squeeze against each other to burst balloons.
She said: "We'd like to make a public apology. Obviously [the emcee, from an outside company,] didn't mean it to be offensive. It's a huge misunderstanding."
She added: "We have an emcee that comes in on Thursday nights, and we invite all diners to participate in the game.
"We don't care what sexuality [they are]. The only thing we don't allow in the restaurant is smoking. That's the only rule we have."

Maggie Gyllenhaal says she wouldn't be able to juggle motherhood and her career without Peter Sarsgaard.
The 36-year-old actress - who has daughters Ramona, seven, and Gloria, two, with her 43-year-old husband - admits he often turns down roles to care for their children so she can work, and he also made her relocate to the UK to film 'The Honourable Woman,' after she turned down a role in the West End last year because she was worried about disrupting their family's life.
She said: "Peter was encouraging me to do this, but I said I can only do it if he didn't work and could guarantee being with the kids. He made it possible for me to be an actress."
Maggie isn't worried about turning 40 in a few years, as she believes there are a lot more opportunities for older actresses these days.
She explained: "I saw Amy Adams recently... She is very slightly older than me, I think, and we were saying that now there are roles which are capturing a vibrant moment in an older woman's life. There was a time when those interesting roles stopped at 28. A few years ago we would have been finished by our age."
The brunette beauty loves spending time in London now, but it was initially "a culture shock" for her.
She told The Telegraph newspaper: "I love working here and I have worked here enough that I have friends and I know where to do grocery shopping."

Kim Kardashian's daughter was reportedly too young to enjoy her first birthday party.
The 'Keeping Up with the Kardashians' star and husband Kanye West threw a lavish Coachella-inspired bash, "Kidchella," on Saturday (21.06.14) to celebrate North's recent milestone, but the little girl spent most of the time in the reality TV star's arms because she was unable to participate in many of the activities.
An eye-witness told UsMagazine.com: "Kim was holding North a lot of the time, and the party seemed to be geared towards a little bit older kids."
The insider insisted: "But it was a family party with all ages, and no matter what age they were, they were having a great time. There was so much to do."
Guests at the mock music festival in Kim's sister Kourtney Kardashian's backyard in Calabasas, California were greeted with tie-dyed wristbands.
Some of the activities on offer included hair braiding, face painting, tie-dying T-shirts and a huge Ferris wheel.
There were also small stalls, picnic benches, performance stages and a bouncy castle at the party.
The couple spared no expense for the celebration, which took place almost one week after North's actual birthday last Sunday (15.06.14).
The famous family spent that day at the Children's Museum of Manhattan in New York City, exploring five floors of literature, science, media and art, and decided to hold a big party a week later in Los Angeles so both of their families could be present.
A source previously said: "They are throwing her a big party next weekend and Kourtney [Kardashian], Khloé Kardashian and [Kourtney's] kids are coming home for it."

Sting spends almost all of his money.
The 62-year-old rocker, who has an estimated fortune of £180 million, insists his six children won't inherit "much money" after he dies because he and wife Trudie Styler enjoy a very lavish lifestyle and don't save their hard-earned cash.
The 'Last Ship' hitmaker told the UK's Mail on Sunday's Event magazine: "I told them there won't be much money left because we are spending it. We have a lot of commitments. What comes in we spend, and there isn't much left."
The British star has two children, Joseph, 37, and Fuchsia, 32, with ex-wife Frances Tomelty, and four children, Brigitte, 30, Jake, 29, Elliot, 23, and 18-year-old Giacomo, with Trudie, and does not want "to leave them trust funds that are albatrosses round their necks".
He added: "They have to work. All my kids know that and they rarely ask me for anything, which I appreciate. Obviously, if they were in trouble I would help them, but I've never really had to do that. They have this work ethic that makes them want to succeed on their own merit."
Sting performed in pubs for £10 a night before finding fame, but he believes the experience added "a resilience and a toughness" to his work ethic.
He said: "If it had all been handed to me on a plate, I'm not sure I would appreciate it or have survived."

Jennifer Lopez and Maksim Chmerkovskiy enjoyed a "very flirty" night out on Saturday (21.06.14).
The 'Dancing With the Stars' performer was spotted celebrating with the 'Booty' hitmaker - who recently ended her relationship with 27-year-old dancer Casper Smart after two-and-a-half-years of dating - at Shrine nightclub in Ledyard, Connecticut after her concert at the Foxwoods Resort Casino.
An eyewitness told UsMagazine.com: "Maks was whispering into her ear and hugging her. They looked very flirty with each other...She had a huge smile on her face and looked like she was having a great time."
The duo recently denied they're dating, but the 34-year-old dancer remained by the 44-year-old beauty's side for most of the night.
The source said they held hands, talked and shared a long hug at the end of the night and before they left separately with different friends.
The 'First Love' singer danced with Maksim - who previously dated Kate Upton - at the American Music Awards last November and they were "inseparable" at his brother Val's birthday party in Los Angeles in March.
But a source close to Jennifer - who has six-year-old twins Max and Emme with ex-husband Marc Anthony - insisted she and Maksim are still just friends for the moment.
The insider said: "They are friends. She doesn't have a second to date anyone right now, and it is definitely not romantic with Maksim."

The Saturdays "sex up" their dance routines when their partners attend shows.
Mollie King has revealed her loved-up bandmates - including Rochelle Humes, Frankie Sandford, Una Foden and Vanessa White - will be going all out to impress their boyfriends and husbands when they embark on their greatest hits tour in September.
She said: "It's funny when everyone's husbands and boyfriends are in, everyone tries to sex it up. So if Wayne [Bridge, Frankie's soccer star fiance] comes down I'll look over at Frankie and she's giving it extra large and I'm like, 'I saw you.' "
The 'What About Us' hitmakers will also be travelling with a full entourage as Frankie and Rochelle will bring their children on tour with them.
Rochelle, who has 12-month-old daughter Alaia-Mai with husband Marvin Humes, said: "There will be a lot of juggling. I'm not being without Alaia-Mai."
However, Una will leave her two-year-old daughter Aoife Belle - whom she has with rugby player husband Ben Foden - at home as she is due to start pre-school.
The red-haired star told Britain's OK magazine: "Aoife will be starting nursery so I'll pop back to see her."

Michael Douglas felt like he was living in his father Kurt Douglas' shadow before winning his second Oscar.
The 69-year-old actor - who won his first Academy Award as a producer of the Best Picture winner 'One Flew Over the Cuckoo's Nest' in 1975 - admits it wasn't until he was crowned Best Actor for 1987's 'Wall Street' that he felt like he'd become his own star.
He said: "My Best Actor Oscar was extremely important to me because it was the first time I felt that I had stepped out of my father's shadow."
However, Michael insists there are some positives to have a famous parent as he believes his dad has helped him stay grounded.
He explained: "The biggest benefit of being a second-generation actor is being able to watch your father and his friends - i.e. Tony Curtis, Frank Sinatra, Burt Lancaster - as people and seeing their foibles and insecurities. You realise they're like anybody else. They've got their issues. So it keeps you kind of grounded."
The actor still has a close relationship with Kurt and tries to see his parents as much as possible, but admits it can be difficult.
He told People magazine: "We live cross-country and it can be hard to get out here, but I'm conscious of touching bases as much as I can. They're not demanding."

Lana Del Rey's tattoos help her feel less lonely.
The 'Born To Die' singer has revealed she recently got 'Nina & Billie' inked across her chest because having the names of her jazz influences and favourite authors on her body makes her feel connected to people during the loneliest times of her life.
She said: "I've been touring for the last three years and it gets lonely. That's the reason I really only have script on my body; I've got Nabokov and Whitman and things like that. I just like the idea of carrying someone with me on the road.
"So I'm bringing Nina [Simone] and Billie [Holiday] on the road. I like doing good luck scripture stuff every year that stays with me. Because you're alone a lot."
The sultry star's videos 'West Coast' and 'Shades Of Cool' even feature her tattoo artist Mark Mahoney, and Lana, 27, admits she owes everything to him and thinks of him as the ideal man.
She said while appearing on France Inter radio station's 'Laura Leishman Project' show: "He's the biggest inspiration in my life. He's my tattoo artist, he did Biggie and Tupac in the 90s. For me, moving to LA and not knowing anyone, just knowing he worked up the street on Sunset Boulevard made me feel a lot less lonely.
"When I met him he was very cool, giving, and serene and kind. And that's definitely the quality of person I'm looking for."