Some actors have a very versatile look, changing each time they're in front of the camera and everyone is okay with it.
But then there are those celebrities who can't just change up their look without looking like a completely different person. It's almost like their hair, makeup or clothing defines who they are and what we recognize about them.
We know that there are more to stars than what they look like, but this list defines those who are so attached to their style that we have to do a double-take when they switch it up.
Zooey Dechanel
Known for her wide doe eyes and blunt bangs this New Girl turns heads with her iconic look.
But what happens when she steps out without her signature hairstyle and eye makeup? She looks like a completely different person!
Joaquin Phoenix
We are used to seeing Joaquin Phoenix as the clean-shaven man with the mesmerizing green eyes. As this Gladiator and Walk the Line actor lit up the silver screen with his iconic look, nobody expected this transformation.
When he steps out with a face fill of hair and sunglasses, we barely recognize him. This look is not something we expect when this guest steps out in the 2009 episode with David Letterman.
Ke$ha
Ke$ha could often be found in a sea of glitter and rhinestones as they cover her outfits and her face. It's hard to picture this singer who established herself as a drunken party girl with a love for alien-inspired costumes on stage, as a sophisticated and glamorous woman.
Today, Kesha has removed the "$" from her name and prefers more of a natural look. She has ditched all the glitter and facepaint for a more natural approach and fans are loving it!
"I felt like part of my job was to be as skinny as possible, and to make that happen, I had been abusing my body. I just wasn't giving it the energy it needed to keep me healthy and strong," she said.
Continue to the next page to see transformations from a pop star and a rock musician.
Lady Gaga
It's no doubt that Lady Gaga has a memorable signature style. From dazzling costumes, to funky hair and weird color combinations, the Monsters singer knows how to leave a lasting impression. From drawing in a crowd at the Superbowl to touring the United States with her hit singles, she is a very unique artist.
Off stage, Gaga ditches the colors and sparkles for her more natural self, and she's not afraid to hide it. Tweeting a selfie of her make-up free visage on her birthday, the Born This Way singer showed off her birthday cake that she was using to celebrate her special day.
"I saved a piece of birthday cake my fans," she wrote. "You made my 20s worth it all. To spreading love, above all things."
Sia
For years people have wondered what the Australian singer looked like underneath her hair and hat. She kept her face hidden to maintain privacy and mystery.
The 41-year-old singer flashed a smile for photographers as she walked through the Los Angeles International Airport fresh-faced and make-up free.
"I don't wear this unless there are cameras around. I only wear this to try and maintain a modicum of privacy," she said while taking part in Carpool Karaoke.
"I was an alcoholic and a drug addict, and I sobered up and I decided I didn't want to be an artist anymore because I was starting to get a little bit famous and it was destabilizing in some way.," she said. "I thought, "˜What doesn't exist in pop music at the moment?' And it was mystery!"
Marilyn Manson
If anyone has a signature look, it's Marilyn Manson. This dark rocker is known for heavy makeup and demonic-looking contacts. You can rarely find a time when he's not sporting a blood red lipstick that is both creepy and intimidating.
Brian Warner looks much less like a spawn of Satan, and much more like a middle-aged rocker without all his dramatic makeup. After making an appearance on Eastbound & Down, fans barely recognized the musician without his signature look.
Pamela Anderson
This Baywatch babe has become known for her dark eyeliner and bold makeup. This beauty bombshell even launched her own makeup collection with everything you need to create her signature look.
"When you put makeup on, you want to look sexy and have fun and [Alexis and I] had this kind of specific look that we used to do and so she convinced me to do this little kit with her," she tells People.
Partnering with makeup artist Alexis Vogel who was the mastermind behind Anderson's Playboy looks.
"She has this shadow shaper and you put it right next to your eye "” the little tricks to just bring everything up and it makes you look more youthful and sexy "” it's kind of the Playboy trick," Anderson shares.
Leaving behind the makeup kit, Pamela decided to show off her natural look and still looks gorgeous.
Taking away the signature pink gloss, heavy black eye makeup and bleach hair teased to the high heavens, this actress could pass for a different person entirely.
What do you think? Should these celebs leave behind their signature or look or hold true to what keeps them unique.
