She hosted a very exclusive Halloween party this weekend.
And all eyes were on Halsey as she slipped into the role of Batman's Poison Ivy for her Friday soiree.
The Without Me singer, 24, left little to the imagination wearing a just a leafy bikini and covering the rest of her figure with green body paint.
Halsey Ivy: Halsey looked seductive in a leafy green bikini as she dressed up as Poison Ivy from Batman for Halloween
She also shared a video of her dancing and lip-syncing to the Panic at the Disco song I Write Sins Not Tragedies, along with DJ Alison Wonderland.
The singer also shared a shot of her in a bathroom, in full Poison Ivy costume, where she even hinted that she re-created a scene from the Batman & Robin movie.
'Fav costume of all time ever,' Halsey said on Instagram. 'Also can’t believe we pulled off the gorilla / poison ivy dance from Batman and Robin. Oh yeah....we went there....
Barely there: 'Fav costume of all time ever,' Halsey said on Instagram. 'Also can’t believe we pulled off the gorilla / poison ivy dance from Batman and Robin. Oh yeah....we went there....'
Jaw-dropping: The singer left little to the imagination in her ensemble
The 'gorilla/poison ivy dance' is a scene from Batman & Robin where Uma Thurman's Poison Ivy character makes a grand appearance at a party.
She's first dressed in a massive gorilla costume before shedding that and dancing with a number of shirtless men before entrancing the crowd with a mystical dust that she spreads throughout the crowd.
She accessorized with green sleeves and flora-adorned heels.
Halsey sported a glamorous red wig as she transformed into the comic book character.
Jade-colored eyeshadow framed her peepers and she matched her complexion to her knockout body.
She was certainly letting ex-boyfriend G-Eazy know what he was missing.
Halsey -whose real name is Ashley Nicolette Frangipane- attended the AMAs earlier this month with the rapper.
The couple, according to E! News , 'were doing well' until the 29-year-old No Limit artist was seen 'flirting with several girls' at Karma International's Kandy Halloween party in Los Angeles on Saturday night.
'G-Eazy was telling everyone that he was single and that he and Halsey are always "on-and-off," but they are currently split,' a source told the media outlet.
That same night, G-Eazy, born Gerald Earl Gillum, gushed about the Bad At Love singer at the 97.1 AMP RADIO's 6th Annual We Can Survive concert.
'I think the world of her,' he told ET . 'She's a really special person, a really special human being. Besides how great of an artist she is, but as a human, I love her.'
Halsey was in Tokyo over the weekend promoting her new single, Without Me, which was inspired by her tumultuous relationship with Gerald.
PEOPLE confirmed the duo's split on Tuesday.
'It's over again for now,' an insider told the magazine. 'He was partying over the weekend and girls were all over him. He didn't care who saw.'
© Associated Newspapers Ltd.