Singer Fergie has revealed the diet secret behind her fit physique - she downs shots of vinegar. The pop star's trainer Natasha Kufa passed on the tip, claiming the vinegar flushes out fat in the colon and helps the body digest food. It also reportedly cuts out cravings.

And Fergie insists the trick really works: "I do vinegar shots. It has to be organic apple cider, unfiltered. Two tablespoons. For some reason I've noticed a difference on my stomach."

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(This news article provided by World Entertainment News Network)