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

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Lori Harvey turned up the heat for Halloween when she flaunted her incredible stomach at a star-studded Halloween Bash in West Hollywood Friday night.

Clad in a midriff-baring red tank top and matching mini skirt, the 25-year-old model arrived alongside Hailey Bieber, 25, who was bedecked in roses and a pink gossamer gown.

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

Red-hot Halloween: Lori Harvey, 25, turned up the heat for Halloween when she flaunted her incredible stomach at a star-studded Halloween Bash in West Hollywood Friday night Following the flower child: Clad in a midriff-baring red tank top and matching mini skirt, the model arrived alongside Hailey Bieber, 25, who was bedecked in roses and a pink gossamer gownWith a dagger slipped into one of her thigh-high black leather boots, Lori strut out of an SUV and entered the celebrity-packed party, which was thrown by former British reality star Vas Morgan and Hollywood socialite Michael Braun.