Adriana Lima, a model for Victoria's Secret, is said to follow a liquid-only diet for nine days before a show. Twelve hours before going on the catwalk, she abstains from all food and drink, in order to lose any water weight gained during the liquid diet. This type of diet is not recommended by medical professionals, but celebrities can get away with this behavior when work requires it.5. Start your day with a twist of lemon Many of us start our day with some freshly squeezed orange juice. Actress Jennifer Aniston, however, is adamant that a different kind of citrus fruit is the way to go for weight loss. Start every morning by drinking a full glass of freshly squeezed lemon juice. She claims that the acidic drink helps her body remove fat and allows her to maintain her slim figure.6. Cleanse Their Colons Before Filming A common practice in Hollywood is for celebrities to undergo a cleanse to remove excess weight and toxins from their colons before filming. Beyoncé is said to have used the Master Cleanse diet to help her lose weight for an upcoming film. The diet, which includes drinking water, cayenne pepper and maple syrup for 14 days, can help users lose weight