15 Celebrity Hair Transformations From 2025 That You Definitely Didn’t See Coming
My next hair appointment will be copying one of these, trust.
Here at Cosmo, there are few things we love more than an unexpected celebrity hair transformation—and wow, 2025 was full of them. From Pamela Anderson’s jaw-dropping ginger shag to Sofia Richie's bob to end all bobs, we’ve been running to and from the salon (screenshots of our latest hair inspo in hand) practically every month.
So naturally, we thought: what better way to pay tribute than rounding up some of our ultimate favorite looks? Enter: the 15 best celebrity hair transformations of the last year. From the trend-setting colors, the dramatic chops, and the cuts that left celebrities unrecognizable, here are the best A-list styles to inspire your next hair appointment.
Sofia Richie's Iconic Bob
Sofia Richie took the word influential to a new level with her summer chop—she single-handedly sparked a bob renaissance that shows no signs of slowing down.
Bella Hadid Goes Blonde
Bella Hadid’s blonde era began at the Cannes Film Festival, and she’s been gradually going lighter every few months since. I've been loving her sun-kissed evolution.
Pamela Anderson’s Shaggy Cut
Pamela Anderson attended Paris Fashion Week and dyed and cut her trademark tresses to mark the occasion. Bye-bye blonde flippy bob, hello textured ginger shag!
Tyla's Bob
Tyla’s been sporting a blunt bob for the last few months, with braids placed right along her side part. It’s hands-down my favorite hair look of hers from the last year, and maybe ever.
Sabrina Carpenter's Mid-Length Haircut
Don't get me wrong, I love Sabrina's voluminous curls and layers, but I was absolutely obsessed with this sleek cut she debuted in Paris, complete with a deep side part.
Rosalía's Halo Hair
Rosalía’s angelic hairstyle features a golden blonde halo at the crown of her head that transformed an unexpected color choice into a cultural beauty moment. It looks especially heavenly atop her long waves.
Ariana Grande Goes Brunette
After years of sporting blonde, Ariana Grande has officially de-Glinda'd herself and returned to her brunette roots. Plus with a voluminous ponytail? We're so back.
Hailey Bieber's Lob
Mrs. Bieber chopped her hair into a lob, and in true Hailey fashion, the style went completely viral. If I ever decide to cut my hair, don't be surprised when it's inspired by this exact length.
Jennifer Lawrence's Bangs
Jennifer Lawrence’s bangs are intentionally uneven and feather-light, giving the fringe a lived-in, effortless feel that looks cool rather than overly styled.
Zoë Kravitz's Major Cut
Zoë Kravitz’s micro bob paired with equally micro side bangs delivers an cut that feels edgy and impossibly cool—something very few pull off.
Kim Kardashian's Pixie
Kim Kardashian went full Kris Jenner a few months back with this glazed pixie cut.
Lola Tung's Raven Black Hair
Long gone is Lola Tung's chestnut brunette tone, and instead, she's channelling a vampier vibe for the New Year!
Keke Palmer's Pixie
Keke was rocking long auburn hair for months, then she went for a major cut into a pixie, and it just suits her so well. She can pull any hair look off, but this one is especially iconic.
Sydney Sweeney's Bob
Sydney Sweeney chopped off at least six inches of her signature waves, debuting a soft, wavy bob that feels fresh and effortless.
Emma Chamberlain's Bleached Pixie
Emma Chamberlain cut her hair into a textured pixie and bleached it for the Met Gala, and is still rocking the cut months later, and it's grown on me immensely.
Jasmine Hyman is the Assistant Beauty Editor at Cosmopolitan, where she writes about the latest beauty trends and must-have products. Her most prized beauty possessions are a meticulous skincare routine and salon blowouts. You’ll also likely find her in bed reading a good book or endlessly scrolling TikTok (spoiler: it’s usually the latter) while listening to Harry Styles’ entire discography on repeat. Follow her on Insta to be inundated with pictures of her meals.
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.
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