Madonna
Healthy diet and exercise require hard work and a positive attitude. While most celebrities have the luxury of being able to afford personal trainers, dieticians, and the like, it's still possible to snag some knowledge from their routines. Read on to learn about how hard these actresses and singers work in order to stay healthy and fit. 
Source: Flickr
The Queen herself is devoted to a macrobiotic diet, a fad diet that's built on ideas about food drawn from Zen Buddhism.
She stays away from dairy products, sugar, alcohol, and caffeine, and works out hard.
Adriana Lima
Source: Wikipedia
Victoria's Secret Angel and supermodel Adriana Lima has engaged in cutting and water loading techniques to stay in peak model condition for runway shows. That's since changed, however, and she works cardio into her exercise routine, along with a diet full of protein and fiber.
Gwen Stefani
Source: Wikipedia
Gwen Stefani is well-known for showing off her crazy-awesome stomach and she works hard to maintain those abs. She did confess to overdoing it, though.
She told Marie Claire that she paused her training in 2015 because her body "just needed a break."
Beyoncé
Source: Wikipedia
"I am a natural fat person, just dying to get out," Beyoncé has said. "I go through agonies to keep my stomach as flat as possible." She's also taken part in the Master Cleanse, a diet developed in the 1940s that features lemonade made with cayenne pepper, lemons, and grade-B maple syrup.
Grace Kelly
Source: Wikipedia
1950s actress Grace Kelly stuck to a meal plan of celery, carrots, apricots, and oatmeal in the mornings.
She left Hollywood and married Prince Rainier of Monaco in 1956, but she said that they still ate whole wheat products and avoided sugar.
Ariana Grande
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"Celebrate yourself. Celebrate others," Ariana Grande tweeted in 2016.
Grande is all about body acceptance. She sticks to a vegan diet and turns to dancing and hiking for exercise.
Ava Gardner
Source: Wikipedia
"I have a diet that would put hips on a snake," this 1950s actress once remarked.
To keep weight on, she ate plenty of bread and butter.
Miley Cyrus
Source: Wikimedia Commons
Miley Cyrus has a gluten intolerance and she maintains a gluten-free diet accordingly.
She studies advanced yoga and works in pilates and hikes as well.
Jennifer Lawrence
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"I’m never going to starve myself for a part," Jennifer Lawrence told ELLE magazine in 2012.
She went on to describe that her ideal body is "fit and strong, not thin and underfed."
Rihanna
Source: Wikipedia
Rihanna's personal trainer has said that she eats five small meals a day and hits the exercise circuit hard.
She alternates between cardio and strength training to spread out her muscle gains.
Oprah Winfrey
Source: Wikipedia
Oprah's weight fluctuation has been well-publicized over the years.
She recently teamed with Weight Watchers in 2016 and lost 30 pounds, vowing to stick with the program for life.
Lena Dunham
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Actress and author Lena Dunham uses the Tracy Anderson workout, a routine that Madonna and Gwenyth Paltrow have also made use of.
She grew to love junk food from a young age and has spent her adulthood working on healthier eating and self-acceptance.
Mindy Kaling
Source: Flickr
Hilarious and beautiful actress Mindy Kaling discussed her self-image with Vogue in a 2014 interview. She takes barre and spin classes, but she doesn't stress herself out: "There’s a whole list of things I would probably change about myself," she said. "For example, I’m always trying to lose fifteen pounds.
But I never need to be skinny. I don’t want to be skinny. I’m constantly in a state of self-improvement, but I don’t beat myself up over it."
Jada Pinkett Smith
Source: Flickr
Jada Pinkett Smith wanted to enter a fitness competition at one point and hit the gym pretty hard.
"I got too muscular," she told SHAPE magazine in a 2015 interview.
Anne Hathaway
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Actress Anne Hathaway has worked with a nutritionist to develop meal plans.
She abandoned veganism in 2014, telling Harper's Bazaar that she "didn't feel good or healthy." She eats a paleo-inspired diet today.
Marlene Dietrich
Source: Wikipedia
1930s actress Marlene Dietrich ate a 13-day "German Diet" every six months.
This meant coffee or tea with toast for breakfast, followed by fruit and vegetables with a seven-ounce serving of protein for dinner.
Queen Latifah
Source: Wikipedia
Queen Latifah worked with Jenny Craig and restructured her eating and exercise habits to lose weight.
"I haven't had to sacrifice anything I normally eat—I just eat a little bit less of it," she told In Touch in 2008.
Zoë Kravitz
Source: Wikipedia
Zoë Kravitz consumed bentonite, a clay with laxative properties that can be added to meals.
She added this substance to her diet in order to prepare for a role in a 2014 movie.
Rita Hayworth
Source: Wikipedia
1940s actress Rita Hayworth avoided carbohydrates and fried foods to stay in shape.
Like many entertainers of her time, her work involved figuratively dancing her ass off.
Julianne Moore
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"I hate dieting... I'm hungry all the time, Julianne Moore said to Eve magazine in 2008.
She sticks to a relatively bland diet of yogurt, cereal, and the like, and works out at home with yoga and light weightlifting.
Gabrielle Union
Source: Wikipedia
"If your stomach is always growling, that sucks. You're not living life.
Have a cheeseburger!" Gabrielle Union said to US Weekly in 2015. She still advocates a healthy, well-balanced diet with lean protein and plenty of vegetables, and her Instagram account shows that she enjoys plenty of gym activity.
Jean Harlow
Source: Flickr
1930s actress Jean "Baby" Harlow had black coffee and orange juice in the mornings, followed by not much more than lamb chops, steak, eggs, and tomatoes.
Clara Bow
Source: Wikipedia
Actress Clara Bow said in a 1925 interview that she'd found a great way to lose weight. "I’d roll around the room like a rubber ball until I was so dizzy that I couldn’t move," she said.
"Then I’d jump up and stagger to the looking glass to see if I’d lost any fat. Say, I’ll bet I rolled a hundred miles in that little room."
Gloria Swanson
Source: Flickr
1920s actress Gloria Swanson declared that while she was in the business of make-believe, she would settle for nothing but real, whole foods.
She was known to eat vegetables straight out of the garden and bring prepared meals and snacks with her wherever she traveled.
Helen Mirren
Source: Flickr
"I've been on a diet my whole life," Helen Mirren told the Radio Times in 2014.
Her exercise routine includes situps, pushups, and leg raises, along with other similar moves.
Melissa McCarthy
Source: Instagram
Gilmore Girls actress Melissa McCarthy dropped from size 28 to size 14 by sticking to a diet of high protein and low carbohydrate foods.
That's a super common combination, seen in The Zone diet, the Atkins diet, and paleo-inspired meal plans.
Marilyn Monroe
Source: Wikipedia
Sex symbol and pop culture icon Marilyn Monroe reportedly skipped lunch, eating raw eggs for breakfast and nothing but protein and a small serving of vegetables for dinner.
