The Best and Most Over-the-Top Halloween Beauty Looks Celebs Wore This Year

Demi Lovato dressed up as Pennywise the clown from the film IT. Her costume was complete with red-coloured contact lenses and extra long stiletto nails.

Jessica Biel threw it back to the late '90s with her costume of one of her husband's looks from his N'Sync days, trademark curly hair and all.

Halsey dressed up as Cher with extra long dark hair, light blue eye shadow, and rhinestones beneath her eyes.

Halsey also dressed up as Marilyn Manson using bright makeup and a fluorescent red wig.

We had to do a double-take when we saw Ashley Graham's Jessica Rabbit costume, which featured the character's signature pastel purple eye shadow and vibrant red hair and lipstick.

Vanessa Morgan put on a berry lipstick and long horns to transform into Disney's Malificent.

Nina Dobrev posted photos of her dressed as Billie Eilish, and the costume was spot-on. The actress wore some of Eilish's most recent beauty looks, like green nails and a centre part.

Nicki Minaj wore paint-dipped pigtails for her version of Harley Quinn.

Gabrielle Union threw it back to her Bring It On days, securing her hair in a high ponytail and suiting up in her Clovers uniform yet again. Daughter Kaavia was also cheer-ready.

Jhené Aiko's Halloween costume featured a short black bob, one of the season's trendiest haircuts.

Lovato channelled 18th-century royalty with her first Halloween costume, which involved heavy makeup and one voluminous wig.

Kelly Osborne dressed as a clown with dramatic costume makeup and a purple wig.

Camila Mendes put on an electric blue wig in a short bob haircut for her Rick Sanchez costume.

King Kylie was Disney royalty with her Little Mermaid costume, which came equipped with a monochromatic wig and lipstick that would make Ariel proud.

Ariana Grande stepped out with a Twilight Zone-inspired Halloween makeup look, which included prosthetics that gave her a heavy brow bone, turned-up nose, and uneven mouth. She credited special effects artist Julie Hassett with the impressive makeup.