Someone's certainly showing G-Eazy what he's missing!

Halsey showcased a super sexy look as she hosted and performed at Playboy's Midsummer Night's Dream party at the Marquee nightclub at the Cosmopolitan of Las Vegas on Saturday.

The 23-year-old singer sported a black halter demi-cup thong bodysuit with matching suspenders, stockings and pumps and a chain belt. She also showcased long, blonde hair, adorned with a black bow tie hairband.

Halsey later posted on Instagram a photo of herself hugging her friend and producer Diplo. She hung out with him at his DJ booth.

"123 squishy face," she said.

"You can see into my nostrils," he commented.

Party guests included several Playboy Playmates as well as Cooper Hefner, late Playboy founder Hugh Hefner's 26-year-old son and Chief Creative Officer of Playboy Enterprises, and his fiancée and Vampire Diaries actress Scarlett Byrne.

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