▲The former Spice Girl swears by Japanese Geisha Facials, which contain bird waste.

▲Say hello to hemorrhoid cream and goodbye to puffy eyes. You can thank Sandra Bullock for the tip.

▲Coffee in the morning? No, thanks. This actress opts for a shot of apple cider vinegar instead.

▲Bathing in red wine? Apparently it is great for your skin, according to the 'Desperate Housewives' star.

▲Kerr’s favorite superfood is coconut oil. The model eats a spoonful of it every day. But her biggest secret? Leech facials.

▲The singer breaks her diet down into colors. The seven-color diet consists of eating foods of just one color per day.

▲It’s all about pH for the former supermodel. She follows an alkaline diet and avoids things such as alcohol and coffee.

▲The Queen of Pop goes on a liquid cleanse diet when it’s either a new or full moon.

▲Ice cubes are a staple in Zellweger's diet. This frozen treat is a sure way to keep your calories in check!

▲The Hollywood star is a fan of baby food. Yes, a diet consisting of baby food jars!

▲The secret to Zeta-Jones' Hollywood smile? Strawberries. Apparently, the malic acid in the fruit helps whiten the teeth.

▲Paltrow is a fan of the elimination diet and has cut off red meat, gluten, and dairy from her diet.

▲Cabbage soup for seven days. Apparently that’s what you need to detox, according to Gellar.

▲Baked Japanese sweet potatoes sprinkled with olive oil and cinnamon seem to do the trick for Munn.

▲Steven Tyler’s daughter swears by cold showers.

▲The actress went on a strict diet of almonds and carrots in preparation for her role in 'Black Swan.'

▲The supermodel is a fan of the keto diet while preparing for the Victoria's Secret Fashion Show. The diet is based on low carbs, high fat, and high protein.

▲A cookie diet? Why not!? The 'Jersey Shore' star eats six cookies a day.

▲The former supermodel likes to use milk as a face moisturizer. Looking at her skin, she must be doing something right!

▲If you think mayonnaise can only be used in food, think again. Lively applies it to her hair, and as you can see, it looks lush!

▲Klum swears by Epsom salt baths. The model likes to soak in a bath full of Epsom salt before attending big events.

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The secret to a beautiful hair? Guacamole, egg yolks, and mayonnaise.

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The star is known to go vegan from time to time.

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The actress swears by skin creams containing placenta. Apparently it’s a great moisturizer and boosts collagen production.

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J.Lo is a big fan of essential oils. She uses a fruit-based oil that allegedly affects the liver enzymes and helps with weight loss.

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The model keeps it simple: a mug of hot water first thing in the morning and another one before bed.

▲Booze is usually a no-no in any diet, but Gaga swears by it. Her 'drunk diet' includes whiskey and other alcoholic drinks!

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Drinking green tea during the day and vodka at night seems to work for Roitfeld.

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Looking to add texture to your hair? Why not use Waterhouse’s hack and rinse it with Coca-Cola?

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Have you ever wondered how celebrities stay on top of their game when it comes to health and beauty? If you’ve always wanted to know the secrets behind their flawless looks, then you’re in for a treat. This gallery is not for the faint-hearted because you’ll find the weirdest hacks celebs swear by! Click through.