Billie Eilish, Paris Hilton, and Salma Hayek leave the glitzy Gucci afterparty at the Chateau Marmont in LA

Billie Eilish appeared to be in great spirits while leaving the glitzy Gucci afterparty at the Chateau Marmont in West Hollywood on Saturday night.

The 21-year-old pop star fronts the new 'Ancora Notte' campaign for the Italian luxury fashion house, and she toted the $3,500 vegan 'Horsebit 1955 Mini-Shoulder Bag' during the launch at the 2023 LACMA Art+Film Gala.

Billie – who was decked out in head-to-toe Gucci – covered her signature red-rooted raven locks in a black sparkly head scarf.

While at the fashion bash, Eilish (last name O'Connell) hung out with Oscar nominee Kirsten Dunst, who looked leggy in a white Gucci sleeveless mini-dress.

The seven-time Grammy winner also enjoyed hanging out with Sitting in Bars with Cake actress Odessa A'zion, who flashed her black bra-top beneath a sheer Gucci frock.

Hilarious! Billie Eilish appeared to be in great spirits while leaving the glitzy Gucci afterparty at the Chateau Marmont in West Hollywood on Saturday night

Hilarious! Billie Eilish appeared to be in great spirits while leaving the glitzy Gucci afterparty at the Chateau Marmont in West Hollywood on Saturday night

'Made from 75% plant-derived raw material sources': The 21-year-old pop star fronts the new 'Ancora Notte' campaign for the Italian luxury fashion house, and she toted the $3,500 vegan 'Horsebit 1955 Mini-Shoulder Bag' during the launch at the 2023 LACMA Art+Film Gala

'Made from 75% plant-derived raw material sources': The 21-year-old pop star fronts the new 'Ancora Notte' campaign for the Italian luxury fashion house, and she toted the $3,500 vegan 'Horsebit 1955 Mini-Shoulder Bag' during the launch at the 2023 LACMA Art+Film Gala

This Friday, Billie and her big brother Finneas will eagerly tune in when the Recording Academy announces the nominations for the 66th Annual Grammy Awards, which air February 4 on CBS/Paramount+.

Also spotted smiling while leaving the afterparty was Paris Hilton, whose hairstylist Eduardo Ponce fastened a faux-ny ponytail to her signature platinum-blonde locks.

The 42-year-old hotel heiress-turned-reality TV icon looked elegant in a blue-patterned gown featuring a cape and sparkly silver heels.

Paris was joined at the 2023 LACMA Art+Film Gala by her husband Carter Reum and her parents, Kathy Hilton and Richard Hilton.

Hilton and the 42-year-old M13 Ventures founder – who are proud parents of nine-month-old son Phoenix Barron – will celebrate their second wedding anniversary this Saturday.

Meanwhile, Salma Hayek sat in the backseat of a car as her husband of 14 years –

billionaire François-Henri Pinault – sat in the front while leaving the Chateau Marmont.

The Mexican 57-year-old and the 61-year-old Frenchman – who are proud parents of 16-year-old daughter Valentina – could not miss the 2023 LACMA Art+Film Gala considering he's the CEO of Kering (which owns Gucci).

What Was I Made For: Billie - who was decked out in head-to-toe Gucci - covered her signature red-rooted raven locks in a black sparkly head scarf

What Was I Made For: Billie – who was decked out in head-to-toe Gucci – covered her signature red-rooted raven locks in a black sparkly head scarf

Hey girl! While at the fashion bash, Eilish (last name O'Connell) hung out with Oscar nominee Kirsten Dunst, who looked leggy in a white Gucci sleeveless mini-dress

Hey girl! While at the fashion bash, Eilish (last name O'Connell) hung out with Oscar nominee Kirsten Dunst, who looked leggy in a white Gucci sleeveless mini-dress

Coy smiles: The seven-time Grammy winner also enjoyed hanging out with Sitting in Bars with Cake actress Odessa A'zion

A'zion flashed her black bra-top beneath a sheer Gucci frock

Coy smiles: The seven-time Grammy winner also enjoyed hanging out with Sitting in Bars with Cake actress Odessa A'zion, who flashed her black bra-top beneath a sheer Gucci frock

Barbiecore: Also spotted smiling while leaving the afterparty was Paris Hilton, whose hairstylist Eduardo Ponce fastened a faux-ny ponytail to her signature platinum-blonde locks

Barbiecore: Also spotted smiling while leaving the afterparty was Paris Hilton, whose hairstylist Eduardo Ponce fastened a faux-ny ponytail to her signature platinum-blonde locks

Walmart collaborator: The 42-year-old hotel heiress-turned-reality TV icon looked elegant in a blue-patterned gown featuring a cape and sparkly silver heels

Walmart collaborator: The 42-year-old hotel heiress-turned-reality TV icon looked elegant in a blue-patterned gown featuring a cape and sparkly silver heels

Family affair! Paris was joined at the 2023 LACMA Art+Film Gala by her husband Carter Reum (L) and her parents, Kathy Hilton and Richard Hilton

Family affair! Paris was joined at the 2023 LACMA Art+Film Gala by her husband Carter Reum (L) and her parents, Kathy Hilton and Richard Hilton

Still going strong! Hilton and the 42-year-old M13 Ventures founder - who are proud parents of nine-month-old son Phoenix Barron - will celebrate their second wedding anniversary this Saturday

Still going strong! Hilton and the 42-year-old M13 Ventures founder – who are proud parents of nine-month-old son Phoenix Barron – will celebrate their second wedding anniversary this Saturday

Salma, as usual, showcased her sensational 5ft2in figure in a golden-ombré Gucci gown selected by stylist Rebecca Corbin-Murray.

Hayek enlisted a sizeable glam squad – including hairstylist Jennifer Yepez, make-up artist Sofia Schwarzkopf-Tilbury, and esthetician Joanna Vargas – to make sure she was ready for her close-up.

The Black Mirror actress will next portray the vengeful Nina in her Eternals castmate Angelina Jolie's fifth feature directorial effort Without Blood also starring Demián Bichir.

The Italian-set trauma drama is based on Alessandro Baricco's 2002 novel about 'the cruelty of war, a little girl's shattered world, and her lifelong quest for revenge and healing.'

Kim Kardashian left the Gucci afterparty in a white car with fashion photographer Mert Alas.

The 43-year-old reality star wore a Marilyn Monroe-inspired hot-pink strapless gown featuring a massive train, along with black opera gloves selected by stylist Danielle Levi.

Kim made sure to pose for a picture with the man of the hour, Gucci's new creative director Sabato De Sarno.

Kardashian currently executive produces and stars in the 10-episode fourth season of The Kardashians, which airs Thursdays on Hulu.

Party's over! Salma Hayek sat in the backseat of a car as her husband of 14 years - billionaire François-Henri Pinault (L) - sat in the front while leaving the Chateau Marmont

Party's over! Salma Hayek sat in the backseat of a car as her husband of 14 years – billionaire François-Henri Pinault (L) – sat in the front while leaving the Chateau Marmont

Boss man: The Mexican 57-year-old and the 61-year-old Frenchman - who are proud parents of 16-year-old daughter Valentina - could not miss the 2023 LACMA Art+Film Gala considering he's the CEO of Kering (which owns Gucci)

Boss man: The Mexican 57-year-old and the 61-year-old Frenchman – who are proud parents of 16-year-old daughter Valentina – could not miss the 2023 LACMA Art+Film Gala considering he's the CEO of Kering (which owns Gucci)

Black Mirror actress: Salma, as usual, showcased her sensational 5ft2in figure in a golden-ombré Gucci gown selected by stylist Rebecca Corbin-Murray

Black Mirror actress: Salma, as usual, showcased her sensational 5ft2in figure in a golden-ombré Gucci gown selected by stylist Rebecca Corbin-Murray

No wrinkles! Hayek enlisted a sizeable glam squad - including hairstylist Jennifer Yepez, make-up artist Sofia Schwarzkopf-Tilbury, and esthetician Joanna Vargas - to make sure she was ready for her close-up

No wrinkles! Hayek enlisted a sizeable glam squad – including hairstylist Jennifer Yepez, make-up artist Sofia Schwarzkopf-Tilbury, and esthetician Joanna Vargas – to make sure she was ready for her close-up

Peek-a-boo! Kim Kardashian (L) left the Gucci afterparty in a white car with fashion photographer Mert Alas (R)

Peek-a-boo! Kim Kardashian (L) left the Gucci afterparty in a white car with fashion photographer Mert Alas (R)

American Horror Story: Delicate actress! The 43-year-old reality star wore a Marilyn Monroe-inspired hot-pink strapless gown featuring a massive train, along with black opera gloves selected by stylist Danielle Levi

American Horror Story: Delicate actress! The 43-year-old reality star wore a Marilyn Monroe-inspired hot-pink strapless gown featuring a massive train, along with black opera gloves selected by stylist Danielle Levi

Mingle: Kim made sure to pose for a picture with the man of the hour, Gucci's new creative director Sabato De Sarno

Mingle: Kim made sure to pose for a picture with the man of the hour, Gucci's new creative director Sabato De Sarno

Ambulance actress: Also leaving the Chateau Marmont on Saturday was Eiza González, who rocked a Gucci bustier with a black leather mini-skirt

Ambulance actress: Also leaving the Chateau Marmont on Saturday was Eiza González, who rocked a Gucci bustier with a black leather mini-skirt

Caveman vibes: The Mexican 33-year-old - who was last romantically linked to Brooklyn Nets point guard Ben Simmons in February - Instastoried a shadowy beach snap of herself with a mystery man that same day

Caveman vibes: The Mexican 33-year-old – who was last romantically linked to Brooklyn Nets point guard Ben Simmons in February – Instastoried a shadowy beach snap of herself with a mystery man that same day

The SKIMS CEO – who passed the 'baby bar' exam in 2021 – originally aimed to pass the California State Bar this year without attending college or law school, but there's only two more months left.

Also leaving the Chateau Marmont on Saturday was Eiza González, who rocked a Gucci bustier with a black leather mini-skirt.

The Mexican 33-year-old – who was last romantically linked to Brooklyn Nets point guard Ben Simmons in February – Instastoried a shadowy beach snap of herself with a mystery man that same day.

Eiza will next portray Auggie Salazar in David Benioff, D. B. Weiss, and Alexander Woo's eight-episode sci-fi series 3 Body Problem, which premieres sometime in January on Netflix.

'After being the biggest Game of Thrones fan I never ever thought I'd be lucky to join these duders and brilliant Alexander Woo on the most epic ride of my life,' González (born Reyna) gushed in 2021 of the small-screen adaptation of Liu Cixin's 2008 novel.

'This story is like no other. If you're not familiar with the Three-Body Problem. Get ready cause you're not gonna know what hit you. Let the count down begin!'

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