Actors and Actresses in Hollywood are under tremendous pressure to always be the right weight. Whether it's losing or even gaining weight for a role, or more commonly just to maintain their perfect figure. Celebrities sometimes have to do some really crazy diets. Not all of them healthy, and very few that are sustainable. If you need to lose weight in a safe healthy way, consult your doctor. If you need to lose weight quick, you can try one of these crazy celebrity diets.

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Beyonce is already one of the sexiest divas anywhere. Why would she need to lose weight? Well she had to for her role in the movie Dream Girls. Incredibly, she needed to lose 20 lbs in 2 weeks. So she went on a master cleanse diet. She only allowed herself to drink water, lemon juice, maple syrup, and cayenne pepper.

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In one of the most horrifying diets, hunky Christian Bale dropped 60 lbs for his role in the The Machinists. Everyday he ate only a can of tuna and an apple. He regained all of it back in 60 days for his role as Batman. In a not so hilarious side note, the 60 pound weight loss turned out to be a typo. The writer had based the weight on his on height and not on Bale's. When informed Christian said, 'don't change the weights. I want to see if I make them.'

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Jennifer Aniston has one of the fittest bodies in Hollywood. She advertises how fit she is in Smart Water ads. But, even she needs to sometimes stretch to lose that extra pound. Its rumored that Jennifer Aniston will sometimes go on a baby food cleanse diet, where she limits herself to eating only 14 jars of baby food a day.

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Matthew McConaughey is another incredibly fit actor. But before preventive drug treatments came along, people with AIDS often wasted away. To play an HIV victim in Dallas Buyers Club, he had to lose 50 pounds. To achieve his goal, He only ate egg whites, a single piece of chicken, vegetables, and drank lots of diet coke everyday.

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Steve Jobs at one time was famous for being a fruitarian, someone who only ate fruit. To prepare for his role as Steve Jobs in the movie Jobs, Ashton Kutcher became a fruitarian just like Steve. Ashton ate only fruit for one month. Unfortunately, being a fruitarian is not very good for your health if not done wisely. Two days before shooting, Ashton had to be sent to the hospital doubled over in pain. Even scarier, his pancreas levels were severely out of norms. Steve Jobs had died of pancreatic cancer in 2011.

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Former Spice Girl, Victoria Beckham, was known as Posh Spice because of her model like looks and fashion sense. But even models gain weight due to pregnancy and Victoria has had 4 with husband David Beckham. To lose her new baby weight after each birth, she lives by the 5 hands diet, which limits herself to eating only 5 handfuls of high energy protein a day.

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The role of Fantine in the Broadway play and movie, Les Misreables, is a poor destitute woman living in poverty. So Fantine has to be extremely thin. To prepare for the role, already thin Anne Hathaway lost 25 lbs by going on a 500 calorie a day diet. She started with a detox diet, eating nothing but radishes and hummus. She eventually only ate dried oatmeal paste to reach her goal weight. Hathaway admits the diet did damage to her health as her bones became brittle. She ended up breaking her left arm in a simple fall.

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Mark Wahlberg lost 60 lbs for his role in The Gambler