Hollywood loves a Halloween weekend (a Halloweekend, one might say). The city is practically built on alter egos, creativity and role-playing, so its no wonder that stars go all out to impress their peers with detailed costumes and awe-inspiring beauty looks.

Last weekend was no exception. While no one quite holds a candle to Heidi Klum's worm costume, there were plenty of Halloween inspo spotted across Tinseltown. Kaia Gerber and Austin Butler went as the ultimate fashion duo Edie Sedgwick and Andy Warhol, Demi Lovato tapped into her Disney past with a Snow White get-up, Paris Hilton paid homage to another icon by dressing up as Britney Spears, and Kendall Jenner kept things chic by channeling Marilyn Monroe in a black turtleneck.

hailey bieber bob haircut
Rachpoot/Bauer-Griffin//Getty Images

Hailey Bieber also got into the Halloween spirit with not one, but two iconic looks, each one featuring a different take on the bob haircut. Bieber attended Vas J. Morgan and Michael Braun's Halloween Party with partner Justin dressed as grown-up Pebbles and Bamm Bamm from The Flintstones.

Read Next

The Rhode skincare founder traded her signature sleeked back bun for a shoulder-grazing tangerine-red blunt bob complete with a jagged fringe and turquoise manicure to match her latex mini. Considering that Bieber's no stranger to inspiring micro-trends such as 'glazed doughnut' skin and 'latte make-up', we're not surprised if 'Stone Age Red' is the next hair colour trend to hit social media.

The 26-year-old also found time to pay homage to another iconic Halloween character, dressing up as Carmen Electra's Drew Decker in the 2000 film, Scary Movie. The photo, shot by Amber Asaly, sees Bieber with a shoulder-length, flipped in bob hair getting caught wet in the sprinklers as per the film's opening sequence.

hailey bieber bob haircut
courtesy of Hailey Bieber via Instagram//Instagram

Bieber's modern day take pairs the hair with impossibly dewy cheekbones (but of course), shimmering grey tones on the eyes and glossy lips no doubt courtesy of Rhode Peptide Lip Tint in Espresso.

Bob haircuts are big news in 2023, with Google searches yielding more than 85M results and stars such as Zendaya and Eva Longoria all opting to get the chop. While Bieber's bobs are most likely thanks to clever wigs, we're definitely adding them to our Pinterest boards, stat.

Headshot of Medina Azaldin
Medina Azaldin
Beauty Editor, ELLE and Harper's Bazaar UK

Medina Azaldin is the beauty editor of ELLE and Harper's Bazaar UK, working across print and digital features. She has more than seven years journalism experience and has previously written for Red and Good Hoousekeeping. When she's not demystifying the latest skincare ingredient, sniffing out the next big perfume trend or uncovering the science behind wellness practices, you'll most likely find her in Hatchards Piccadilly or watching a crime series with her cats. Oh, and she's a competitive cheerleader, too.