Some celebs were spooky, some went silly and others stuck to y with their pre-Halloween costumes this weekend.
Ahead of the actual Oct. 31 holiday, weekend Halloween parties presented plenty of opportunities to get into the spirit with top-notch looks.
"I’m here to assist your shhhttaaaankin ass," Cardi B quipped while sharing a snapshot of herself dressed as a y nurse on Twitter.
Demi Lovato, who's already shown off two different costumes — Marie Antoinette and Pennywise — on Instagram warned: "I told y’all I don’t play on Halloween!! It’s my time to shine."
Others paid tribute to each other: Nina Dobrev pulled off a fierce Billie Eilish, Halsey transformed from Marilyn Manson to Cher and Jessica Biel showed up as a throwback of husband Justin Timberlake's boy band days.
Check out some impressive Halloween costumes from this year's celebrations (so far) below.
Cardi B as a Nurse
Liam Payne as Clark Kent
Nina Dobrev as Billie Eilish
Jessica Biel as Justin Timberlake in *NSYNC
Halsey as Marilyn Manson & Cher (With Evan Peters as Sonny)
Demi Lovato as Marie Antoinette & Pennywise
Kylie Jenner as Madonna (Kissing Britney)
Lisa Rinna as Jennifer Lopez
G-Eazy as a Vampire & Edward Scissorhands