Secrets to celebs' sexy bikini bodies revealed

Wondering how celebrities manage to look fab in a two-piece? Well, stop scratching your head, for the stars have revealed the secrets to their slim bodies.

"She's not drinking alcohol and has done an organic detox for a week," the News of the World quoted a source as saying.

Popstar Britney Spears ditched a stone by cutting up the dance floor on her world tour and cutting back on the sweet stuff.

"I have no sugar. And I don't have fruit or fruit juice either," she said.

Singer Katy Perry has said that she hates to exercise but likes skipping.

"I hate working out, but I love jumping rope. There's a rhythm -- it's like dancing. I can double jump, cross. I can do all of it," she said.

Fergie downs shots of vinegar, which her trainer Natasha Kufa claims flushes out fat in the colon and helps the body digest food.

"I do vinegar shots. It has to be organic apple cider, unfiltered. Two tablespoons. For some reason I've noticed a difference to my stomach," she said.

Mel B's secret weapon is making sure she takes time out from her fitness regime once a week.

"I love exercise. If you do it consistently and eat healthily, your body will really kick into gear. I like healthy, clean food. We don't do butter or salt, but we have a bit of olive oil. We usually eat grilled fish and steamed veg with a lovely dressing and salads. It's got to be tasty. But once a week I do my "Sod it Sunday" and eat what I want," she added.

Supermodel Elle Macpherson stays slim by including fish oil in her daily organic diet.

"I'd encourage everyone to give it a go," she said.

Heroes star Hayden Panettiere attributes her beautiful figure to a portion control system called the quarter rule.

Cindy Crawford looks as good in her 40s as she did in her 20s. Rather than starving herself, she does the opposite and snacks during the day.

"I snack between breakfast and lunch and again at 4 pm so I'm not starving by the time I sit down to eat dinner," she said.