As the leaves change and the air grows crisp, the most anticipated event of the year has arrived - Halloween. This year, the celebrity fashion world has been abuzz with some truly remarkable costume choices, showcasing their creativity and flair for the dramatic. From Heidi Klum's iconic E.T. transformation to Janelle Monáe's equally impressive take on the beloved alien, the stars have certainly set the bar high. But the festivities didn't stop there, as M.A.C Cosmetics hosted a Halloween party that saw Yves Tumor completely unrecognizable, and a Princess Diana-themed soirée that drew the likes of Dianna Agron and Zoë Kravitz. Join us as we delve into the sartorial highlights of the week, celebrating the bold, the beautiful, and the downright spooktacular.

Dazzling Displays of Style and Substance

Best Dressed: Hari Nef

Hari Nef stunned in a gorgeous sequined dress with a single sleeve armlet, making a statement at the Nordstrom and Courrèges dinner celebrating their limited-time pop-up and exclusive capsule collection in New York City. The striking ensemble effortlessly blended glamour and edge, showcasing Nef's impeccable fashion sense.

Best Dressed Runner-up: Linda Evangelista

Legendary supermodel Linda Evangelista exuded timeless elegance in a sleek Donna Karan coat at the WWD CEO Summit. Her effortless style and commanding presence proved that she remains a true fashion icon, commanding attention with her every step.

Best Dressed Group: Tina Knowles, Kathryn Chenault, and Thelma Golden

At the Studio Museum of Harlem Gala 2024, Tina Knowles, Kathryn Chenault, and Thelma Golden showcased their impeccable taste, each donning stunning gowns that perfectly complemented one another. Their coordinated yet individualized looks were a testament to their collective style prowess.

Best Costume: Yves Tumor

Singer Yves Tumor was the talk of the town at M.A.C's Hex Halloween party, completely unrecognizable in their jaw-dropping costume. The transformation was so impressive that it left onlookers in awe, showcasing Tumor's commitment to pushing the boundaries of self-expression.

Best Botany: Olivia Palermo

Olivia Palermo brought a touch of nature to the Saks launch party with AFEW Rahul Mishra and AK|OK's Anamika Khanna, sporting a floral-embellished two-piece ensemble that exuded elegance and sophistication.

Most on Theme: Margarita Levieva, Rebecca Dayan, Zoë Kravitz, Dianna Agron, and Yola Jimenez

This group of fashionistas went all-in on the "Very Lady Di" theme for the Frankie Shop and Unemployed Halloween party, channeling the late Princess Diana's iconic style with their impeccable outfits. Their coordinated efforts proved that they were the true embodiment of the evening's theme.

Best Styling: Araminta Mellon

At the Moda Operandi event celebrating Françoise's Exclusive Capsule, Araminta Mellon stood out in a stunning lace ensemble, showcasing her exceptional styling skills and eye for detail.

Best Tastemaker: Astrid Terrazas

Artist Astrid Terrazas made a bold statement at the opening night of "New York ... NOW!", the inaugural exhibition of a new gallery in the Lower East Side, wearing a captivating mesh dress that perfectly captured her artistic flair.

Best Lipstick: Caroline Vazzana

Influencer Caroline Vazzana effortlessly blended patterns and colors at the grand opening of Farm Rio's Brooklyn store, but it was her mauve lip color that truly stole the show, complementing her red glasses and creating a striking look.

Best Accessorized: Pierce Abernathy

Chef Pierce Abernathy proved that accessories can make all the difference, sporting some stylish On Running accessories while cooking up a delicious dinner for the brand's event celebrating the NYC marathon and their latest innovation, lightspray.

Best Outerwear: Michèle Ouellet Benson

Michèle Ouellet Benson looked impeccable in a perfectly cropped peacoat at the Los Angeles store opening of Trish Wescoat Pound's clothing brand, TWP, showcasing her exceptional taste in outerwear.

Best Je Ne Sais Quoi: Cassie Coane and Emily Ratajkowski

Cassie Coane and Emily Ratajkowski exuded effortless style at the LESET's Five Year Anniversary party, wearing elevated neutrals and red shoes that perfectly captured the essence of off-duty chic.