What's more, the "Son of a Sinner" singer opted to change up his facial hair, ditching his signature beard for the first time in a decade.
"One of the reasons I even started growing a beard is I was so obese," he explained on Instagram in November after the big buzz. "It was just easier to cover up what was happening here."
But he wasn't the only star who scrapped their scruff. Jason Momoa went clean-shaven in preparation for his role of Duncan Idaho in Dune: Part Three. But unlike Jelly Roll, he wasn't quite ready to part with his beard.
"Goddammit," the Aquaman actor joked while shaving his face in a July Instagram video. "I hate it."
And speaking of hair, this year saw dozens of colorful changes—with Ariana Grande and Ariana Madix both going brunette, while Kate Middleton lightened her dark brown tresses.
For more major transformations of 2025, keep reading...
The "Flowers" singer had fans doing a double take on Oscar night, when she stepped out at the 2025 Academy Awards looking unrecogniable with bleached eyebrows.
Proving that she's a bigger style chameleon than Hannah Montana, Miley then rocked micro bangs to the Vanity Fair after-party.
The Disney Channel later explained her ever-changing style, telling InStyle, "It’s whatever is real in that moment."
After dropping over 200 pounds in his yearslong weight loss journey, the country music star underwent another major transformation when he shaved off his signature beard.
"I look like a ninja turtle," he quipped in a November Instagram video. "Crazy. One of the reasons I even started growing a beard is I was so obese, it was just easier to cover up what was happening here."
Even his wife Bunnie Xo was floored by his clean-shaven face.
"I have never seen this man without his facial hair," she said in an Instagram video of her own at the time. "You look so fine, dude."
The Princess of Wales had a blonde moment in September, sporting honey-colored locks when she and husband Prince William visited the Natural History Museum in London.
As for the reason behind the hair color change? "It used to be brown," she explained in November, per the Daily Mail, "but it’s gone light in the sunshine."
What started out as online criticism about her "puffier" face led to a Cushing syndrome diagnosis for the Trainwreck star, who learned last year she had the hormonal disorder that can cause death if left untreated.
Since then, Amy embarked on a wellness journey that saw her lose 50 pounds. As she explained in a December Instagram post, "Not to look hot which does feel fun and temporary. I did it to survive."
"I had a disease that makes your face extremely puffy and can kill you but the internet caught it and that disease has cleared," she continued, defending herself against backlast over her transformation. "Sorry for whatever feeling it’s giving you that I lost weight."
The 1000-Lb. Sisters star, who lost over 500 pounds in her yearslong weight loss journey, underwent another transformation in the summer by filling in a gap in the top row of her teeth.
"They had to cement them in because the glue wasn’t holding," she shared of the process in an August episode of the Creative Chaos podcast. "They had to pull teeth."
As for the past criticism of her smile? Tammy quipped, "Haters make me famous."
Though the "Karma" singer rocked her signature ponytail at the 2024 GLAAD Media Awards, she traded it in for a colorful mohawk one year later.
She paired the edgy haircut—which was tinted to match the colors of the pride flag and the transgender flags—with a bedazzled jacket reading, "Trans rights are human rights."
The American Idol alum went back to her literal roots when she opted for a brownish blonde 'do, revealing that it was the first time in 30 years she had rocked the hair color.
"Well, the last time I saw my natural hair color, I was probably about 12 years old," Carrie wrote on Instagram in August, "but I thought it might be time to give it a second chance."
By December, she looked nearly unrecognizable when she debuted her darkest waves yet.
Shortly after filing for divorce from Keith Urban to end their 19-year marriage, the Oscar winner changed up her look by sporting bangs at Paris Fashion Week in October.
But this wasn't the first 'do Nicole tried out in 2025. At the Met Gala in May, she rocked a short, neck-length haircut with brown roots that her hairstylist Adir Abergel, said was inspired by "essence of Dandyism."
Aquaman, is that you? That's what fans were asking when Jason shaved his beard for the first time in six years.
He underwent the big buzz in order to film Dune: Part Three, in which he'll reprise his role of swordmaster Duncan Idaho after sitting out the movie franchise's second installment in 2024.
"Goddammit," Jason quipped of his lack of facial hair in a video shared on Instagram in July. "I hate it."
A brunette bombshell has entered the villa! The Love Island USA host traded in her blonde tresses for dark brown locks in November.
"Before we even styled it, I was feeling myself," she shared in a TikTok video. "I have been blonde since the day I was born and I've tried every shade of it, and I was just so tired of being that."
The Vanderpump Rules alum added, "I was taking thirst traps in the salon, I was so thrilled.
The Secret Lives of Mormon Wives husband spilled a secret of his own in December, revealing that he got veneers from Dr. James Heaton of the Arizona-based The Smile Studio.
"Been wanting to fix my smile for years," he wrote on TikTok, "and 4 seasons of reality tv and enough internet trolls got me to pull the trigger."
And his wife Jen Affleck gave her seal of approval, commenting under the video, "That's my man."
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