Sabrina Salerno, the Italian singer, songwriter and model, hasn't slowed down since she sold 20 million records worldwide and her 1987 single "Boys (Summertime Love)" topped European charts. On the contrary, Salerno — who is sometimes known simply as "Sabrina" — is out and about and looking amazing at 54, as in this Instagram video in which she is in "navigation [i.e., sailing] mode." Read on to see how Sabrina Salerno 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!

"Starting a detoxing diet on monday… " Salerno tweeted recently. A detox diet usually involves eliminating some foods from your diet — including sugar, caffeine, etc. — or substituting solid food with juices or green tea. "That supposedly gives your digestive system a break, allowing it to heal and better absorb nutrients in the future," said registered dietitian Kate Patton. "Most of the time, the ingredients suggested in a cleanse aren't necessarily bad for you. They're just not likely to do what they say." Better just to eat a healthy diet with lots of vegetables and fruit, low carbs and healthy proteins — and drink water.

 Salerno sails and does watersports, at least according to her Insta. Watersports such as swimming are well known to benefit the cardiovascular system and provide a great low-impact workout. Then there's all the vitamin D created by exposure to direct sunlight, which has been shown to benefit multiple systems of the human body. Just make sure to wear adequate sunscreen!

Sabrina once touted drinking tomato juice. "From the oldest café in the world … tomato juice, very spicy and with a lot of lemon …," she said. Tomatoes are rich in antioxidants, including lycopene, as well as potassium, vitamin C and fiber, the Mayo Clinic said.

"Back at my fitness. #fitness #cannotlivewithout," she posted on Instagram, referring to her local gym, Bamboo Fitness. The U.S. Department of Health and Human Services recommends that adults do a minimum of 30 minutes of moderate-intensity aerobic activity five days a week to reduce the risk of chronic disease later in life.

 Salerno works out with a mix of planking, squats, weight training and free body exercises, according to the Italian La Gazzetta dello Sport. She recently resumed training sessions at the gym and at home after a hiatus in February. Now she works out three to four times a week.