Have celebrities found the Fountain of Youth and are holding its whereabouts a secret? It's mind-boggling how stars like Jennifer Lopez and Gwen Stefani, who both just turned the Big 5-0 this year look better than they did before they reached Hollywood status. These two celebs and countless others haven't aged over the past 20 years.

Stars including Halle Berry, who is 53 years old, looks exactly the same, and can we all know 54-year-old Shania Twain's secret to rock hard abs and a perfect physique? These stars are clearly not only taking great care of their health and wellness, but they've also got good genes.

Female celebrities are proving 50 is the new 20 and we've got the photos to prove it. Just how do these stars keep up with their youthful appearances? Check out these 20 photos of female stars that clearly prove age is just a number.

20 Jennifer Lopez Is Body Goals

It's a mystery how Jennifer Lopez never seems to age. The singer celebrated her 50th birthday on July 24th, in Miami, and we just can't get over how the star's appearance has barely changed. J.Lo even embarked on her first concert tour in nearly seven years to celebrate turning 50!

19 Halle Berry Works Out Five Times A Week

Who wouldn't want to look like Halle Berry at 53-years-old? The actress still makes jaws drop when she walks a red carpet or attends a movie premiere. According to Pop Workouts, to maintain her perfect figure, the star finds time to work out five days a week, doing mostly cardio workouts and circuits of upper and lower body routines.

18 Jennifer Aniston's Self-Care Routine Is What Everyone Should Be Doing

Jennifer Aniston turned 50 in February, and still retains the same figure she had when she was starring as Rachel in Friends. According to Insider, Aniston's killer shape is thanks to working out an hour per day and taking different classes including spin-classes, yoga classes and does strength training.

17 Gwen Stefani Lifts Weights And Takes Boxing Classes To Keep Her Pristine Looks

Like Aniston and Lopez, singer Gwen Stefani is 50 years old and still makes fans question how she can maintain such a perfect physique. According to Pop Workouts, Stefani isn't into yoga or Pilates because she is "more like a man." The singer explained, "I like going to the gym and lifting weights or doing a little boxing."

16 Catherine Zeta-Jones Looks Younger Than Her 50 Years

Actress Catherine Zeta-Jones recently celebrated her 50th birthday in September and leaves fans speechless with how she looks. Standing next to her daughter Carys in this photo, the two almost look like twins. In an interview with W Magazine, the actress admits her exercise obsession consists of swimming, tennis, peloton, her home gym, and tap dancing.

15 Lucy Liu Proves Age Is Just A Number

The beautiful 50-year-old Lucy Liu is known for her roles in action films like Charlie's Angel and Kill Bill so she has always made sure to maintain a great figure. She admits that doing Pilates for over 10 years has changed her body and outlook on life, according to Health Fitness Revolution.

14 Kyle Richards Looks Just Like Her Stunning Daughters

Standing next to her two older daughters in this photograph, it's hard to believe that reality star Kyle Richards is 50-years-old. The socialite told Bravo that she has "struggled with her weight" because she is not "naturally thin," but looking here, the star seems to be doing just fine.

13 Elizabeth Hurley Shows Off Her Amazing Curves

The Royals star Elizabeth Hurley is 54 years old and proves that age is just a number in this photo. Rocking a white bathing suit, the actress is living her best life and not letting her age interfere with doing whatever she wants. This photo just proves that her constant work isn't aging her one bit.

12 Shania Twain's Rock Hard Abs At 54 Leaves Us Speechless

Country star Shania Twain has her vegetarian and plant-based diet to thank for her anti-aging health and weight loss. The singer also combines her healthy eating with workouts such as Pilates, which helps keep her body toned and lean, according to Celebrity Health Fitness.

11 Sandra Bullock Continues To Have Fans In Awe Of Her Beauty

Sandra Bullock has always managed to stay toned and that's thanks to her constant workout schedule. According to Pop Workouts, the Bird Box star does a combination of workouts, including stretching, dance cardio, Pilates and yoga. Fans can't believe that this actress is already 55 years old!

10 Courteney Cox Looks Better Than Ever

Like her Friends co-star Jennifer Aniston, the 55-year-old Courteney Cox continues to shock fans with her anti-aging secrets. The star states, "my fitness philosophy is to be active in life and enjoy what I am doing," adding, " I have always loved exercise and feel that being active is important to maintain not only physical health, but mental health as well."

9 Marisa Tomei At 54 Stuns As Spider-Man's Aunt May

Marisa Tomei stars as Spider Man's Aunt May in both Spider-Man: Far From Home and Spider-Man: Homecoming and everyone was shocked to learn that Tomei is actually 54-years-old. The actress hasn't aged a bit and can easily fool someone into thinking she was 25.

8 Elle Macpherson Rocks Her Supermodel Good Looks In A Bikini

Models are supposed to stick to a strict workout routine and diet plan, but it can get a lot trickier when you're older. However, 55-year-old Elle Macpherson has defied all odds by keeping up her model looks and gorgeous figure. Macpherson can still rock any look and even put younger models to shame.

7 Cindy Crawford At 53 Could Still Rock The Runway

Cindy Crawford looks incredible at 53 and her daughter, Kaia Gerber is easily her doppelganger. Crawford admitted that her anti-aging secrets are her very own beauty products, Meaningful Beauty by Cindy Crawford, that she mastered with the help of a French dermatologist. With just a few products, the model swears by it every day.

6 Sharon Stone Continues To Age Gracefully

At 61-years-old, Sharon Stone is defying age. The actress proves here that her age is just a number and that it shouldn't slow her down. In 2015, when Stone was 58 years old, she posed with no clothes on for a photoshoot for Harper's Bazaar, and let fans know that she still looks incredible.

5 Marcia Cross Is Everyone's Favorite Desperate Housewife

Marcia Cross is best known as perfectionist Bree Van de Kamp on the hit show Desperate Housewives and has proven that her age doesn't defy her. At 57-years-old, the actress continues to have fans in awe with her natural beauty. The star also has her personal trainer to thank for her great looks!

4 Sonja Morgan Is Living Her Best Life At 55

Real Housewives of New York star Sonja Morgan is living her best life at the age of 55. The reality star is looking better than ever, showing off her unfiltered beach photos and makeup-free face in recent photos. In an interview with Lookbook, Morgan explained that her secrets to looking younger are taking "everything in moderation," and a little bit of "working hard but also playing hard."

3 Brooke Shields Still Retains Model Figure

At 54-years-old Brooke Shields has aged gracefully and has managed to retain her natural beauty thanks to beauty products she uses daily. However, the one thing the actress and model constantly uses to keep herself looking fresh is moisturizer, which she admits she always keeps in her purse, according to Today.

2 Salma Hayek Praised By Fans As The Most Beautiful Woman On Earth

Actress Salma Hayek just turned 53-years-old, but fans would never guess that by looking at the beautiful star. According to Insider, Hayek was praised by her fans as the "most beautiful woman on earth" after she posted a photo of herself after gaining 12 million followers on her Instagram account.

1 Yolanda Hadid Could Give Her Model Daughters A Run For Their Money

Yolanda Hadid's daughters, Gigi and Bella Hadid are two of the most gorgeous models on earth, but it looks like Yolanda is giving them a run for their money. The mom looks drop-dead gorgeous while rocking a bikini and proving that you can still look amazing at 55-years-old.

Sources: popworkouts,com, insider.com, healthfitnessrevolution.com, bravotv.com, womenshealth.com, today.com