Huma Abedin looks effortlessly chic as she attends Jeff Bezos and Lauren Sanchez's housewarming party in New York City without fiancé Alex Soros

A slew of A-listers stepped out in their most lavish ensembles to attend Jeff Bezos and Lauren Sanchez's housewarming party in New York City - including Huma Abedin, who ditched fiancé Alex Soros for a solo night out.

Hollywood heavyweights such as Karlie Kloss, 31, Nicki Hilton, 40, and Jay-Z, 54, were also invited the event at the Amazon CEO's luxe Madison Square Park apartment building, in which he owns five units.

Jeff, 60, dropped a whopping $119 million on the apartments - with his latest splurge being in 2021 when he picked up a $23 million unit - and he made sure to showcase his portfolio by throwing the prestigious event just days after he and fiancée Lauren returned from a sun-soaked getaway.

And while Hillary Clinton's longtime aide Huma, 47, is a seasoned pro at rubbing shoulders with the city's most elite, she is usually accompanied by husband-to-be Alex.

However, the brunette beauty opted to go solo yesterday when she left the billionaire heir behind while she mingled the night away. 

A slew of A-listers stepped out in their most lavish ensembles to attend Jeff Bezos and Lauren Sanchez's housewarming party in New York City - including Huma Abedin

Hollywood heavyweights such as Karlie Kloss , 31, Nicki Hilton, 40, and Jay-Z, 54, were also invited the event at the Amazon CEO's (seen with Lauren in 2023) luxe Madison Square Park apartment building

Huma, who was previously married to disgraced politician Anthony Weir, was photographed outside the Amazon founder's house alongside a mystery man. 

The 47-year-old has kept her romance largely under wraps since getting engaged to the son of billionaire George Soros last month - but looked as chic as ever in a one-shoulder black midi dress with a pair of black heels.

In addition to Huma, other guests were also seen donning effortlessly chic attire as they entered the CEO's housewarming party.

Karlie Kloss mirrored Huma's elegant aesthetic as she sported a plunging black gown.

She threw on a pair of black strappy heels and let her brunette locks fall behind her as she held onto husband Joshua Kushner's hand. 

CEO of clothing company Alice + Olivia Stacey Bendet also made a jaw-dropping appearance in her in a cheetah print dress. 

Fashion designer and model Nicki Hilton followed suit as she donned a snakeskin gown while clutching onto her husband, James Rothschild's arm. 

Sports Illustrated model Brooks Nader - along with her lookalike sisters - also attended the star-studded bash. 

Huma, who was previously married to disgraced politician Anthony Weir, was photographed outside the Amazon founder's house alongside a mystery man 

The 47-year-old has kept her romance largely under wraps since getting engaged to the son (seen in May) of billionaire George Soros last month 

Fashion designer and model Nicki Hilton followed Huma's suit as she donned a snakeskin gown while clutching onto husband James Rothschild's arm

Karlie Kloss mirrored Huma's elegant aesthetic as she sported a plunging black gown as she held onto husband Joshua Kushner's hand

Brooks, 27, showcased her stellar looks in a lace brown dress that accentuated her trim waistline.

Jay-Z and Gayle King also attended the party as they flashed a grin at the cameras.

According to Architectural Digest, Jeff splashed out a total of $80 million in early 2019 when he first purchased a trio of apartments in a grand building overlooking Madison Square Park. 

His lavish buy featured a three-floor, 10,000-square-foot penthouse that came complete with a extravagant ballroom, marble library and glass fireplace. 

It also boasted a seven-room main suite and a three-bedroom unit below. 

One year later, Jeff opted to buy a fourth unit in the same building for $16 million. 

He then further invested in the luxe area in 2021 by buying a $23 million unit. 

Following the purchase of the five units, Jeff's total holdings in the building came out to a jaw-dropping $119 million and a show-stopping 24,551 square feet.

In addition to the sprawling units in Madison Square Park, the tech billionaire also boasts an impressive real estate portfolio that comes out to a eye-watering $500 million. 

Karlie threw on a pair of black strappy heels and let her brunette locks fall behind her as she strode into the party

Sports Illustrated model Brooks Nader - along with her lookalike sisters - also attended the star-studded bash 

Jay-Z and Gayle King also attended the party as they flashed a grin at the cameras

Stacey Bendet (left) wowed in a cheetah print dress as she made an eye-catching appearance as Helena Althoff (right) sent heads spinning in a chic all-grey ensemble

The rest of his property portfolio sit at only the best locations, such as: Lake Washington, Central Park, Texas, Beverly Hills, Washington, D.C., Hawaii and Florida. 

The star-studded bash comes just weeks after he and Lauren enjoyed a loved-up vacation on his lavish mega yacht. 

The lovebirds soaked up the sun during the relaxing and romantic getaway in Greece alongside the brunette beauty's ex-boyfriend Tony Gonzalez, his wife October, and a few of their other pals - including Kim Kardashian.

And, the future Mrs. Bezos has made sure to show off her sizzling physique while on the lavish vacation.

Lauren and Jeff have been island hopping on his luxury $500 million mega yacht Koru since the beginning of June - with Koru meaning 'new beginnings' in Maori.

Jeff's 230-foot tall yacht, which he commissioned in 2018, currently holds the record for being the world's tallest superyacht.

Fashion model Allie Rizzo and restaurateur husband Scott Sartiano also made an appearance to the star-studded bash 

The party comes just weeks after he and Lauren (seen in April) enjoyed a loved-up vacation on his lavish mega yacht

The Koru is the second-largest sailing ship in the world.

The superyacht holds a special place for the couple, with Lauren and Jeff getting engaged there in early 2023.

Lauren detailed the heartwarming moment Jeff got down on one knee while speaking to Vogue last year.

She recalled how Jeff popped the question on the $500million superyacht after they enjoyed a romantic dinner under the stars together.

Lauren said Jeff concealed the huge diamond ring under her pillow, adding that she almost 'blacked out' when she discovered it at the end of their romantic evening.

The couple recently relocated from Seattle, Washington, to Indian Creek Island in Florida - with Jeff purchasing three mansions on the island, totaling a whopping $237 million.