Paris Hilton and Demi Lovato put on their best costumes for a star-studded Halloween party in Los Angeles on Saturday evening.

The reality TV personality, 42, looked red hot in a latex bodysuit teamed with frilly bottomless chaps and a spotted cap with a black wig for her sexy mushroom princess costume.

To go with her outfit, the socialite — who had dressed up as Britney Spears in her pal’s Toxic music video for the Casamigos party — also sported red, fingerless latex opera gloves as well as pointed-toe stilettos to match.

As she posed for photos at Vas J Morgan and Michael Braun’s Halloween celebration with Booby Tape, she rocked a pair of oversize, cat-eye sunglasses with a white frame.

Her husband, Carter Reum, 42, wore a red sweater and a matching cap to her own and was also spotted carrying her purse and jacket as he followed her into the party.

Paris Hilton dons latex ensemble ahead of Halloween bash
Halloween bash: Paris Hilton , Demi Lovato , and Kate Beckinsale put on their best costumes for a star-studded Halloween party in Los Angeles on Saturday evening

 

Sexy Snow White: For her costume, Demi Lovato, 31, showed up as a glamorous, busty Snow White with a plunging neckline and carrying a red apple clutch purse.

Halloween bash: Paris Hilton and Demi Lovato put on their best costumes for a star-studded Halloween party in Los Angeles on Saturday evening

For her costume, Lovato, 31, showed up as a glamorous, busty Snow White with a plunging neckline and carrying a red apple clutch purse.

The songstress curled the ends of her raven black bob in and wore a large bow headband on her head, which matched her bold, red lipstick.

The Heart Attack hitmaker put on a sultry rendition of the classic Disney princess outfit as she strutted into the party in white platform Mary Jane heels.

Also spotted at the star-studded affair was Kate Beckinsale, 50, who dressed as a sexy space disco fighter girl.

The Underworld actress teased her strawberry blonde hair to the nines and rocked a distressed, rhinestoned, and sheer bodysuit underneath a disco crop top and belt.

Demi Lovato Channels Her Roots, Dresses As a Disney Princess For Halloween:  Photo 4980236 | Demi Lovato, Disney, Halloween, snow white Photos | Just  Jared: Entertainment News

Ashley Benson, 33, was also spotted heading into the party with her fiancé, Brandon Davis, in tow.

The pair sported glamorous going out ensembles but added vampire-inspired makeup on their faces and necks.

The Pretty Little Liars actress, who is pregnant and expecting her first child with the oil heir, wore a black T-shirt and pants as well as a crocodile-embossed trench coat.

Vibrant latex outfit: To go with her mushroom princess outfit, the socialite also sported red, fingerless latex opera gloves as well as pointed-toe stilettos to match

Vibrant latex outfit: To go with her mushroom princess outfit, the socialite also sported red, fingerless latex opera gloves as well as pointed-toe stilettos to match

In good company: Paris was joined by her husband Carter Reum as she left Morgan's party later that night

In good company: Paris was joined by her husband Carter Reum as she left Morgan's party later that night

In good company: Paris was joined by her husband Carter Reum as she left Morgan’s party later that night

Wig and sunglasses: As she posed for photos, she rocked a pair of oversize, cat-eye sunglasses with a white frame

Wig and sunglasses: As she posed for photos, she rocked a pair of oversize, cat-eye sunglasses with a white frame

Couples' costume: Her husband, Carter, 42, wore a red sweater and a matching cap to her own and was also spotted carrying her purse and jacket as he followed her into the party

Couples’ costume: Her husband, Carter, 42, wore a red sweater and a matching cap to her own and was also spotted carrying her purse and jacket as he followed her into the party

Feeling cheeky: Inside the party, she posed for photos showcasing her cheeky ensemble

Feeling cheeky: Inside the party, she posed for photos showcasing her cheeky ensemble

Out of this world: Kate Beckinsale, 50, teased her strawberry blonde hair to the nines and rocked a distressed, rhinestoned, and sheer bodysuit underneath a disco crop top and belt

Looking good: Kate Beckinsale was also in attendance at the event on Saturday evening

Ready for action: The Underworld actress teased her strawberry blonde hair to the nines and rocked a distressed, rhinestoned, and sheer bodysuit underneath a disco crop top and belt

Ready for action: The Underworld actress teased her strawberry blonde hair to the nines and rocked a distressed, rhinestoned, and sheer bodysuit underneath a disco crop top and belt

She carried a matching purse and walked in in a pair of chunky, platform booties.

She left her warm brunette hair down in soft beach waves and also sported a pair of oversize, wayfarer shades to shield her eyes.

For makeup, she opted for a bright crimson lip and also had fake blood dripping down the side of her mouth.

Both Benson and Davis had two puncture teeth marks drawn onto their necks in the same spot.

Twin sisters Malika and Khadijah Haqq were also spotted at the bash, dressed in figure-hugging bodysuits.

Malika wore black velvet booties with her printed bodysuit with animal ears as a cheetah.

Khadijah wore a baby blue bodysuit, silver metallic booties, and alien-inspired sunglasses.

The stylish pair both sported makeup to go with their respective costumes.

Vampirish couple: Ashley Benson, 33, was also spotted heading into the party with her fiancé, Brandon Davis, in tow

Vampirish couple: Ashley Benson, 33, was also spotted heading into the party with her fiancé, Brandon Davis, in tow

Matching bite marks: The pair sported glamorous going out ensembles but added vampire-inspired makeup on their faces and necks

Fun: The pair sported glamorous going out ensembles but added vampire-inspired makeup on their faces and necks

All-black outfit: The Pretty Little Liars actress, who is pregnant and expecting her first child with the oil heir, wore a black T-shirt and pants as well as a crocodile-embossed trench coat

 

Chic look: She carried a matching purse and walked in in a pair of chunky, platform booties

All black outfit: The Pretty Little Liars actress, who is pregnant and expecting her first child with the oil heir, wore a black T-shirt and pants as well as a crocodile-embossed trench coat

Glamorous gals: Twin sisters Malika and Khadijah Haqq were also spotted at the bash, dressed in figure-hugging bodysuits

Glamorous gals: Twin sisters Malika and Khadijah Haqq were also spotted at the bash, dressed in figure-hugging bodysuits

It's Fred and Wilma! Justin Bieber showed off his heavily tattooed body as he left the party with wife Hailey - the pair had attended the event as animated cartoon characters from The Flintstones

It’s Fred and Wilma! Justin Bieber showed off his heavily tattooed body as he left the party with wife Hailey – the pair had attended the event as animated cartoon characters from The Flintstones

Looking good: Hailey Bieber's PVC outfit ensured she stood out at the event on Saturday night

Looking good: Hailey Bieber’s PVC outfit ensured she stood out at the event on Saturday night

Where's Woody? Billie Eilish arrived dressed as a Toy Story character

 

Where's Woody? She sported a gun holster and cowboy hat with her costume

Where’s Woody? Billie Eilish arrived dressed as a Toy Story character, complete with gun holster and cowboy hat

Upbeat: The American singer appeared to be in high spirits as she chatted to pals outside

Upbeat: The American singer appeared to be in high spirits as she chatted to pals outside

Hand-in-hand: Billie and her friends clung onto one another as they headed into the venue