Watch: Ariana Madix Reveals Her Bombshell-Worthy Fitness RegimenA bombshell has entered the ballroom. Ariana Madix debuted newly-dyed brunette locks as she returned to Dancing With the Stars to celebrate the dance competition show's 20th anniversary celebration two years after placing third on season 32. The Love Island USA host wore her hair down to show off its new chocolate hue, which is a major switch-up from her signature blonde locks. She paired her striking new 'do with a three-piece white set that included billowing high-waisted pants and a button-down worn completely open over a bra top that showed off her abs. All three pieces featured matching gold and floral embellishments that tied the look together. Ariana's DWTS appearance comes after she shed some light into her fitness routine, which fans had been wondering about as a result of the jaw-dropping looks she rocks on Love Island USA, which often highlight her toned physique. "It's weightlifting like every day," she told E! News last month. "It's cardio most days."readAriana Madix Reveals Her Bombshell-Worthy Fitness Regimen"But then, even when I'm not necessarily feeling great that day," she added, "it's going out there and kind of faking it." The 40-year-old also shared that she's not super restrictive with herself when it comes to her diet, saying she doesn't "have much" when it comes to advice in that arena.

Disney/Eric McCandless "I do try to make sure I'm getting enough protein and enough fiber," Ariana shared. "I'm not binging on carbs right before I go to bed, but I don't really restrict anything else." The Vanderpump Rules alum's boyfriend Daniel Wai also happens to be her trainer, which he shared actually benefits their sessions together. "When you're training someone you're dating, you can't treat them exactly like a regular client," Daniel told E! in August, "but Ariana responds really well to that dynamic. She knows how to take direction and is good about asking for help when she needs it." Ariana isn't the only star to debut a major hair transformation. Keep reading for more celebs who've changed up their locks...

Sami Sheen/InstagramSami SheenThe daughter of Charlie Sheen and Denise Richards shared her at-home hair dying journey, including its many missteps, on TikTok and raved about the results. "I've been wanting to do this to my hair for years now," she said, "and I'm so happy that I finally did it."Raymond Hall/GC Images; Instagram/Carrie UnderwoodCarrie UnderwoodTrading in her signature golden locks, the country music star wrote on Instagram in August 2025, "Well, the last time I saw my natural hair color, I was probably about 12 years old, but I thought it might be time to give it a second chance."Shane Anthony Sinclair/Getty Images; Instagram/Jason MomoaJason MomoaIn July 2025, the actor shaved off his beard for the first time in six years to film Dune: Part Three, which required him to rock a clean shaven look to reprise his role of Duncan Idaho.

Denise Truscello/Getty Images for Live Nation Las Vegas/Instagram/NBCKelly ClarksonThe American Idol winner debuted a shorter hairdo in a July 2025 The Voice promo, trading her signature blonde waves for a shorter, darker bob style.

Instagram / Chris Pratt / Matt Baron/BEIChris PrattThe actor debuted a bearded look, which he sports on season two of The Terminal List, in June 2025.

John Nacion/Variety via Getty Images; Jun Sato/WireImageFinn WolfhardThe Stranger Things star changed up his trademark shaggy hairstyle in May 2025 by debuting a buzzcut at the 2025 Crunchyroll Anime Awards in Tokyo, Japan.

Jamie McCarthy/WireImage; Matt Baron/BEI/ShutterstockSebastian StanThe Marvel actor said goodbye to Bucky Barnes' signature long hair in April 2025, showing off a shaved head at the Los Angeles premiere of Thunderbolts*.

Jon Kopaloff/Getty Images; Steve Granitz/FilmMagicJoJo SiwaIn March 2025, the "Karma" singer debuted her rainbow mohawk at the GLAAD Media Awards. Instagram; TikTokEmily RatajkowskiIn a March 2025 TikTok video, the model called this 'do with shaggy bangs the "worst haircut of my life."Instagram / Gypsy Rose BlanchardGypsy Rose BlanchardThe Gypsy Rose: Life After Lockup star debuted a short bob in March 2025, more than two months after giving birth to her and fiancé Ken Urker's first child, daughter Aurora Urker.

Clifton Prescod/Bravo/Charles SykesWhitney RoseThe formerly blond Real Housewives of Salt Lake City star debuted a red bob on Watch What Happens Live in January 2025.

Instagram / Hailey BieberHailey BieberThe model debuted lighter locks in September 2024, a month after giving birth to her and Justin Bieber's first baby, son Jack Blues Bieber.

Pascal Le Segretain/Getty Images/Araya Doheny/FilmMagicLily CollinsThe Emily in Paris star debuted her dramatic transformation at the world premiere of her new horror movie, MAXXXINE, in June 2024. "Changing my hair always brings out different sides of my personality and I love playing around," Lily told Vogue. "This cut and color