Christie Brinkley in Bathing Suit Says "You Are My Sunshine" 

Christie Brinkley is in a swimsuit, and showed it off in a birthday post for son Jack Paris Brinkley Cook, who just turned 27. "You are my sunshine," she captioned it. The 68-year-old supermodel always looks toned due to her fitness and beauty routine. How does she stay so fit? Read on to see 5 ways Christie Brinkley stays in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

1. She Eats the Rainbow

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“Not only are fruits and vegetables delicious, but countless studies concur that eating the rainbow of veggies and fruits can help you lose weight, stay healthier, and fight off disease,” says our sister site Eat This, Not That! "Without any fruits or vegetables in your diet, you are likely to fall short of your daily fiber needs," registered dietitian Erin Palinski-Wade, RD, CDE author of Belly Fat Diet For Dummies, tells the website. "When you lack dietary fiber, you are more at risk of obesity, heart disease, and even certain cancers," she says.

2. She Keeps Moving

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"Don't stop moving because you'll rust," she said to The Cut. "You have to grease the joints and keep moving. As long as I do that I feel great. If you start to hold still, they'll start acting up." “Physical activity helps improve your cholesterol, lowers blood pressure and strengthens bones and muscles, prevents heart disease and gives you more energy. Being active and moving more is also good for your mental health and an important way for you and your family to have some fun and connect with others, too. Remember to increase your activity level gradually and check with your provider if you have any health concerns,” says the Mayo Clinic.

3. She Enjoys Coffee

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“Nonalcoholic fatty liver disease occurs when extra fat builds up in liver cells. It affects 1 in 4 people in the U.S., mostly in those who carry excess weight or have diabetes or high cholesterol. Over time, it can cause cirrhosis or scarring of the liver. That scarring can lead to liver cancer or liver failure,” says the Cleveland Clinic. “But research shows that people who drink a lot of coffee have a lower risk of developing nonalcoholic fatty liver disease.”

4. She Has a Glass of Wine

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“Red wine, in moderation, has long been thought of as heart healthy. The alcohol and certain substances in red wine called antioxidants may help prevent coronary artery disease, the condition that leads to heart attacks,” says the Mayo Clinic. “Any links between red wine and fewer heart attacks aren't completely understood. But part of the benefit might be that antioxidants in red wine may increase levels of high-density lipoprotein (HDL) cholesterol (the "good" cholesterol) and protect against cholesterol buildup.”

5. She Loves Dogs

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"When you are a pet owner, you want to have them stick around as long as possible,” she has said. “Research has shown that simply petting a dog lowers the stress hormone cortisol , while the social interaction between people and their dogs actually increases levels of the feel-good hormone oxytocin (the same hormone that bonds mothers to babies),” says Johns Hopkins. “In fact, an astonishing 84 percent of post-traumatic stress disorder patients paired with a service dog reported a significant reduction in symptoms, and 40 percent were able to decrease their medications, reported a recent survey.”

Christie Brinkley is heating up social media at 68. The supermodel shared some swimsuit snaps to social media on Wednesday, taken from a photo shoot with Social Life Magazine. “Ta ta for now,” she captioned the photo showing off her fabulous figure and ample assets in a purple bathing suit. How does she manage to look half her age? Read on for 5 ways Christie Brinkley stays in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

1. She Is Active

“Don't stop moving because you'll rust. You have to grease the joints and keep moving," she told The Cut. "As long as I do that I feel great. If you start to hold still, they'll start acting up." Christie is a genius at incorporating exercise into her life. "While I'm brushing my teeth, I'm doing leg lifts. When I'm drying my hair, I do all kinds of squats,” she added.

2. She Eats Big Meals in the Morning

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"A lot of mornings lately I will take a bowl and I throw some oatmeal right into it," she dished to Shape about her diet. "I rarely have time to cook it so I just eat it raw. Then I'll pour some flax seed on top of that and maybe a little wheat germ, then I'll grab a couple of handfuls of blueberries, blackberries, raspberries and rinse them off, toss them in and then I pour one of those Dannon things on top and stir it up. I always describe it…it's like a really moist juicy muffin. It is so good. I feel like it is giving you a lot of good things. You can also throw a handful of walnuts in there."

3. She Eats As Plant-Based As Possible

"I haven't touched a piece of meat since I read a graphic description of Chicago's slaughterhouses when I was 12," she told Harper's Bazaar. Instead, she tries to eat as plant-based as possible. "I call myself a flexible vegan because, you know, Italy exists. Mozzarella and pasta exist. In France, I may have to have a piece of Camembert, you know. Un petit sandwich au fromage,” she added to The Cut.

4. She Consumes Lots of Colors

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Christie is a big fan of the rainbow diet. "For lunch, I go into greens and do a salad, then add a protein like a bean or nuts," she told The Cut. "For many, many, many years, I've always said go for as many colors as possible in a day," she said. "That's my main concept for making sure my kids get all the nutrients—making sure the deep greens, yellows and reds and purples, all of that."

5. She Drinks Warm Water with Lemon

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"I start every day with warm water and lemons. It's something I picked up on my Instagram," Christie told The Cu about her go-to morning drinkt. "Some days I alter it, and I get fancy and I put a little bit of mānuka honey on the rim of the glass, turn it upside down, and dump it in red cayenne pepper. Then I put the lemon juice in and then the hot water. That's when I have a little time. I figure that the pepper gets my system all revved up, and the lemon water gets everything flowing through."

Christie Brinkley is one of the most iconic supermodels of all time. And she’s still looking incredible these days, despite being 68 years old. Brinkley posted a stunning new photo on Instagram of herself posing in a bathing suit in her home. She showed off her new art pieces, calling them her “treasures.” How does she stay so fit? Read on to see 5 ways Christie Brinkley stays in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

1. She Eats A “Rainbow Diet”

Brinkley eats a lot of colorful foods in her diet. On her Instagram story, she posted a photo of her “rainbow diet”, which includes a salad, fruits, and stuffed peppers. In an interview with Shape, Brinkley said, “For many, many, many years, I've always said go for as many colors as possible in a day. That's my main concept for making sure my kids get all the nutrients—making sure the deep greens, yellows and reds and purples, all of that.”

2. She Invests In Wellness

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For Brinkley, wellness is extremely important. She says that wellness is a lifestyle for her, and that she puts a lot of time and investment in it. Brinkley told The Cut, “For me, [wellness is] a lifestyle, it's a foundation for your future. Because your health is your greatest wealth. I really think that's something everybody needs to invest in."

3. She’s Vegetarian

Brinkley is open about enjoying a vegetarian diet. She says that she is an animal lover, and that this pushed her to cut out meat. Brinkley says that she’s also tried several other meat-free lifestyles over the years, but has stayed constant with her vegetarian diet. “Over the years I've been a vegan, I've been a macro-biotic, I've been a lacto-ovo,” she said to The Cut. “The one constant since the day I stopped eating meat was that I haven't eaten any red meat or fowl."

4. She Did Research, Before Changing Her Diet

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Before Brinkley became a vegetarian, she had to do a lot of research. She knew that she’d be cutting out a major source of protein in her diet, and wanted to make sure she’d still be eating a balanced diet without meat. “When I became vegetarian I started reading books right away because I knew that I had to replace the protein and figure out what to do,” Brinkley told The Cut.

5. She Loves Oatmeal, Raw

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Brinkley tells Shape that she eats pretty healthy each day. For breakfast, the model’s go-to is oatmeal, and she loves to put other healthy ingredients, like berries, in it. Brinkley also says that she enjoys it raw. "I rarely have time to cook it, so I just eat it raw. Then I'll pour some flaxseeds on top of that and maybe a little wheat germ, then I'll grab a couple of handfuls of blueberries, blackberries, raspberries and rinse them off and toss them in.”