Lori Harvey displays her flat stomach at star-studded Halloween bash in West Hollywood

Lori Harvey set the fire to Halloween when she showed off her incredible stomach Friday night at a star-studded Halloween Bash in West Hollywood.

The 25-year-old model, dressed in a midriff-bare red tank top and matching miniskirt, arrived next to Hailey Bieber, 25, who was adorned with roses and a pink gossamer dress.

Harvey capped off her evening by leaving with Barbarella herself as Stassie Karanikolaou, 25, nailed Jane Fonda’s iconic space traveler in a strawberry blonde wig and revealing bodysuit.

After the flower child: Dressed in a midriff-bare red tank top and matching miniskirt, the model arrived alongside Hailey Bieber, 25, who was adorned with roses and a pink gossamer dress

With a dagger in one of her thigh-high black leather boots, Lori stepped out of an SUV and entered the celebrity-filled party hosted by former British reality star Vas Morgan and Hollywood socialist Michael Braun.

The couple’s annual party has become a Halloween must-see for many celebrities, and Steve Harvey’s adopted daughter didn’t pass up her chance to impress the A-list.

Lori rocked a bob and wrapped a glittering sash around her stunning waist. A gold snake coiled around the model’s tinted upper arm, matching her sash and gold earrings.

Not to be overshadowed, Hailey Baldwin brought back the romance of summer with roses and pink ruffles. The founder of Rhode Skin beamed in her whimsical look, which was plucked from the 1999 YSL runway show.

Tight security: Lori and Hailey enter the celebrity-filled party hosted by former British reality star Vas Morgan and Hollywood socialite Michael Braun. The annual soiree has become a Halloween must for many celebrities

Harvey’s dazzling white smile returned as she left the party, hand in hand with Stassie Karanikolaou.

Kylie Jenner’s best friend wore a strawberry blonde wig and sultry black bodysuit to look exactly like Barbarella – the titular psychedelic space explorer from the cult 1968 sci-fi film.

The It Girl influencer’s costume featured a strategic cutout at her waist, perfectly displaying her flat stomach next to Lori Harvey’s sensational torso.

Smile of the night: Harvey’s dazzling white smile returned as she left the party, holding hands with Stassie Karanikolaou, 25

Sexy space cadet: Kylie Jenner’s best friend wore a strawberry blonde wig and sultry black bodysuit to look exactly like Barbarella

Nailed: Stassi has nailed Jane Fonda’s iconic space traveler from the 1968 cult sci-fi film Barbarella

Stassie’s sheer tights struggled to contain the stunner’s voluptuous qualities as a few runs ran down her right leg at the end of the night.

The model’s bodysuit curved around the top of her thighs to expose her wide bum as Harvey followed her.

The founder of SKN by LH also showed off her thighs by wearing a slit in her miniskirt, smiling for the cameras as she boarded the black party bus.

Lori’s warrior look proved she’s doing just fine after her summer divorce from Michael B. Jordan, 35.

The couple announced the end of their one-year relationship in June and Harvey didn’t seem to miss the movie star at all on Friday night as she kept glamorous company and turned heads.

Halloween Warrior: Lori rocked a bob and wrapped a glittering sash around her jaw-dropping waist. A gold snake coiled around the model’s tinted upper arm, matching her sash gold earrings

Ample assets: Karanikolaou has exposed her wide rear as Harvey chased her with a dagger that slipped into one of her black leather boots

Stepping up: The founder of SKN by LH also showed off her thighs by wearing a slit in her miniskirt, smiling as she stepped to the black party bus