Over the years, Billie Eilish has debuted many a hair transformation. From alien green roots to blood-red lengths, there's not much the singer hasn't experimented with – colour-wise. Or so we thought...
This year, Hallo-weekend (aka, 2023's Halloween celebrations) has provided many scream faces; That is, quite literally for the jaw-dropping dramatic hair makeovers provided. We've seen Paris Hilton, Adele and Kendall Jenner all switch up their signature 'do's but my personal fave of the szn has to be Billie's cosplay that mashes up the best of cowboy copper hair with strawberry blonde cottagecore aesthetics. She was made to yeehaw!
Taking to her Instagram Story overnight, the star shared pictures from her Saturday night out. As shown with the screenshots below, Bills decided to dress up as Jane Fonda in the 60s western movie, Cat Ballou.
Of course, the entire 'fit is an absolute slay but what no doubt completed the look was Billie's strawberry blonde locks. After all, it couldn't be further from her trademark jet-black lengths.
Now, as much as we'd love to believe that Billie has dyed her hair permanently, seeing as this look arrived on our feeds in honour of spooky season traditions, we're going to assume that she is, unfortunately, wearing a wig. Boo!
Alas, despite this red-toned hair colour being somewhat of a fleeting visit, there's no denying how much it suits Billie. She's giving all the autumnal hairspo vibes and for that, we must thank her.
Everyone's clicking on...
Serves all-round.
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Lia Mappoura (she/her) is the Beauty Writer at Cosmopolitan UK, with over four years of experience reporting across the brand's print, social, video and digital platforms. Lia covers everything from emerging trend analysis to viral celebrity hair and makeup moments, making her an expert at spotting the season’s next big beauty look (before it takes over social media feeds).
In 2025, she was named The Rising Media Star at the Love Perfume Awards with The Perfume Shop, recognised for her outstanding digital fragrance content and for building genuine authority within the space. She is passionate about challenging outdated beauty stereotypes, championing inclusive representation in beauty, and educating readers on the trends, products and conversations shaping the industry today. Follow her on Instagram or find her on LinkedIn.
