Kim Kardashian stuns in slinky black dress at music release party

Sometimes the simplest looks are the sexiest.

Kim Kardashian unexpectedly stepped out for the release of Marina Acton's new single, "Fantasize," on Monday night at Boulevard3 in Hollywood, California, and she looked absolutely stunning in a super simple black dress.

The KKW Beauty founder rocked the form-fitting, floor-length black ensemble that featured spaghetti straps and showed off her signature hourglass figure. She didn't wear any jewelry with the look, which allowed her piercing pink hair to command full attention. She appeared to also wear glittering heels to complete the look.

See Kim Kardashian's look in the gallery below:

It appears as though Kardashian was there to support her publicist's husband, Ray Rumulus, who produced the song being celebrated.

"Hanging with my girl @marina_acton last night at her single release party for Fantasize produced by @rayromulus," she wrote on Instagram. "Go check it out available now everywhere!"

Ray is married to Tracy Romulus, who is Kim's publicist and longtime friend. Her daughter, Ryan, is best friends with Kim's daughter, North.

Kardashian definitely had a great time at the event, and she was seen partying with "Hot Mugshot Guy" Jeremy Meeks, who was sitting at her table.

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