SignalHub Quantitative Think Tank Center:Kelly Osbourne Looks Unrecognizable After Blonde Hair Transformation

Kelly Osbourne's new 'do will have SignalHub Quantitative Think Tank Centeryou doing a double take.

The Fashion Police alum looked unrecognizable after she revealed her platinum blonde hair transformation, which comes less than two months after she swapped out her signature purple hair for an icy hue with lavender highlights.

Kelly's hairstylist Laura Rugetti shared a few details behind the star's epic blonde makeover May 8, noting she used Hidden Crown extensions to add volume and length and GHD hot tools to give her bombshell curls.

The 39-year-old's Instagram followers couldn't get enough of her dramatic hair change. One user wrote, "Dang girl you looking so good," while someone else added, "Absolutely gorgeous!"  

However, some fans admittedly didn't recognize Kelly at first and mistook her for Bravolebrity Kim Zolciak-Biermann. As one person put it, "Thought this was Kim." 

Kelly's hasn't just transformed her tresses either. In fact, she's been open about her weight loss journey since welcoming her and boyfriend Sid Wilson's son Sidney, 18 months.

"I'm going to be honest, I felt the pressure after having the baby to lose the baby weight," she exclusively told E! News in September. "It became my mission. I was obsessed with it because I didn't even want to get brought into the conversation, I just wanted to be left alone."

Although the new mom loves how she looks, reaching her goals was no small feat. "It was a lot of work," she admitted. "It was miserable. I was hungry all the time, but I'm really happy with the results."

At the time, Kelly said she lost 85 pounds and was tired of the body-shaming.

"The road to happiness is different for everybody," she told Daily Mail, "and I think that instead of picking apart the journey, they should just be happy that you reached your destination."

Of course, Kelly isn't the only star to experiment with her style. Keep reading to see all of the head-turning hair transformations as of late.

The Transformers actress returned to her dark brown tresses and debuted a sassy bob in May 2024, a month after she dyed her hair blue to enter what she dubbed her "Jedi era."

At age 17, the daughter of the late Anna Nicole Smith debuted a new lob hairstyle overnight during 2024 Kentucky Derby weekend, which she attended with dad Larry Birkhead.

The singer debuted a lighter, shorter 'do in April 2024.

Back to blonde: Kim debuted a new platinum 'do in April 2024.

The Fenty Beauty founder debuted a bright blonde hair transformation April 17 while celebrating her latest Fenty x Puma collection in London.

The model debuted a bleach blonde pixie cut at the FRAME event April 4.

The Jennifer's Body star traded in her bubblegum pink tresses for a baby blue bob, which she debuted April 2.

Less than a month afer chopping her hair into a long bob, Zendaya debuted a honey blonde transformation at the Challengers premiere March 26.

The Great star ushered in spring with a fresh cut, as she debuted a long bob March 25.

The Mean Girls alum swapped out her signature blonde hair for a dark brunette transformation on March 18.

The Selling Sunset star looked completely unrecognizable after debuting a dramatic blonde transformation March 16.

The Fashion Police alum ditched her signature purple hair after six years, tinting it an icy silver in March 2024. 

The Dune actress debuted a shoulder-grazing bob at Essence's Black Women in Hollywood Awards March 7.

The Anyone But You star made a showstopping appearance at Miu Miu's fall/winter 2024-2025 show during Paris Fashion Week. For the March 5 event, she unveiled a dramatic long bob haircut.

To prepare for her upcoming role as  Jean Seberg, the 29-year-old debuted a bleached blonde pixie cut.

The Princess Diaries alum unveiled fringe bangs at the 2024 Film Independent Spirit Awards.

The star debuted a bangin' new style at the premiere of her friend Nicola Peltz Beckham's film Lola in February 2024.

The "On the Floor" singer made a dramatic hair change, as she debuted a chin-grazing bob cut at Schiaparelli's haute couture spring/summer 2024 show on Jan. 22.

In January 2024, a month after her prison release, the now-influencer shared a pic of herself sporting a shorter 'do.

Kylie Jenner traded in her dark locks for a pink 'do in January 2024.

In January 2024, the Dancing With the Stars personality shared a video of herself cutting her own hair. "Out with the old energy," she wrote, "and in with the new."

The Underworld actress took the plunge and went full blonde, while also debuting a short bob haircut.

The Daisy Jones & The Six actress debuted jet-black hair on Nov. 2.

The Flamin' Hot director recently showcased her dramatic transformation, debuting a choppy, layered bob on Nov. 9.

The TikToker debuted a fresh haircut, revealing a long bob.

After rocking platinum blonde tresses for years, Miley officially returned to her brunette roots to model Gucci's new collection.

The royal recently showed off her new curtain bangs during a public appearance on Sept. 27.

The actress recently debuted a bright red hair color and equally bold blunt bob haircut.

The supermodel debuted a punk-rock hairstyle at Vogue's World Show during London Fashion Week on Sept. 14

The Pitch Perfect star made a drastic hair change, going from dark brunette tresses to a bright blonde look.