▲Mariah Carey is another star who only looks better with time. Here are her secrets to getting a good night's sleep…

▲Apparently, Hayek drinks a calcium-magnesium beverage every night. "It helps me. It also helps you go to the bathroom. You sleep well," she explained.

▲Carey goes to sleep with 20 humidifiers set up around her bed. Talking to V magazine, she explained: "Basically it's like sleeping in a steam room. The bed is all terry cloth, the ceiling is pitched so the water can't fall on my head."

▲Salma Hayek is one star who just doesn't seem to age. But how does the 'Frida' actress get the best beauty rest?

▲The former 'Glee' starlet has a great recipe for getting some rest.

▲Miranda Kerr made it big as a Victoria's Secret Angel. She certainly has the keys to sleeping success.

▲Jennifer Aniston's answer to getting a good rest? Put your phone away!

▲Each night, Lea Michele drinks simple lemon tea before she goes to sleep. "It's very simple," she told Byrdie.

▲Kloss is a revered model and businesswoman, who also knows exactly how to get some good sleep on a red-eye flight.

▲All it takes is a couple drops of melatonin to knock Kloss out. "As soon as I get on an overnight flight, I like taking melatonin to help me fall asleep and feel well-rested."

▲This A-list star seems to be an expert in wellness and self-care. So how does she get a good night's sleep?

▲More than a model, Elle Macpherson is a bold businesswoman and TV host. On paper, her plan to get some rest makes a whole lot of sense.

▲Well, every night Paltrow runs herself a bath. "It's my ritual to get grounded and get the energy of the day off," she told Byrdie. "I have all different kinds of salts and oils and scrubs. I'm a real bath girl."

▲Kerr recommends lavender mist to get some shut-eye. "At nighttime, I spray the mist on the pillow and on my face. That is my ritual. The lavender mist is so calming so I just keep that by my bed," she told Vogue Australia.

▲Charlotte Tilbury has always known how to look great. She's a beauty editor for British Vogue and an iconic makeup artist who takes her job to sleep with her!

▲She keeps a notebook right by her bedside, and jots down notes and ideas before she rests her head.

▲Despite her young age, Bella Hadid is already a fashion star. Looking beautiful is her job, so a good night's sleep can be very important.

▲Jennifer Lopez is a multi-faceted star, but her nighttime routine is actually pretty simple.

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That's right, Tilbury actually recommends sleeping with eye makeup still on. "I take off all my eye makeup, and then I reapply it [...] I always say it's my bedroom eye because it just makes me feel great."

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Getting sleep around snorers can seem like mission impossible. Tom Cruise would know, but he has it in check.

▲Actually, Obama likes to sleep in every now and then. In fact, he normally received a White House wake-up call. "If I don't wake up the first time, they just keep on calling," he told Ryan Seacrest.

▲Cruise reportedly invested and sleeps in a snoratorium: a small, dark sound-proof room.

▲With 18 gold medals and a rigorous workout routine, you'd have thought that Michael Phelps was out cold as soon as he hit his bed.

▲"I think what works best is sleep, water, and a good cleanser," she told Health.com.

▲During his presidency, Barack Obama was one of the busiest men in the world. So how did America's 44th President get some rest?

▲Speaking with Teen Vogue, Hadid revealed that she "recently started listening to meditation music which makes me have a deeper sleep [...] I'm usually out by the fourth song."

▲Oprah Winfrey is one of the world's most successful media personalities, and she has one tip for getting that all-important good night's rest.

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But he actually slept in an altitude chamber, a contraption that simulates an environment at high altitude.

▲Appearing on the 'Thrive Global Podcast,' Aniston said: "My one key tip [...] is to sleep with my phone at least five feet away from me. That's helped me tremendously."

▲"In the evening, I have a bath before bed; it's a ritual. I'm a bathing professional," Winfrey told Harper's Bazaar. "I have different bubble baths, salts, beads, and oils."

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Sleep: we all need it. However, few of us actually get a good night's rest. If you're an insomniac, or just find it hard getting some shut-eye, maybe these celebrities can help. From Gwyneth Paltrow to Jennifer Aniston, plenty of celebs have the keys to getting some great rest. Click on to read some celebrity-endorsed sleeping tips.