A sitcom star drops an alarming amount of weight... a rocker balloons up after her breakup... While binge eating, anorexia and bulimia have always been a concern for moms with young daughters, love/hate relationships with food aren't reserved for the young. Women everywhere are battling with food -- and celebrities are no exception. Is there a health crisis in Hollywood or are they just like millions of other women and can't get a handle on the battle of the bulge?

We asked momlogic contributor Diane Hendericks, a.k.a. Dietician In The Kitchen, Chef & Nutritionist about the effects on yo-yo dieting and why women do it in the first place...

"Although the medical effects of yo-yo dieting haven't been fully proven, there has forever been theories about what it can do to you physically. The official term for this is called "weight cycling" and some say that it can slow down your metabolism, leave you with more fat than muscle, give you more fat around your gut and it will be harder to lose the weight again once you gain it back. As you get older, it's harder to lose pounds because your metabolism is slower. The psychological effects can also be devastating -- feeling like a failure, falling into depression and having an overwhelming lack of self-control. It can be so frustrating because you've done it before and you promised never to get back to this place."

Diane adds there are 5 reasons why celebrities' (and real women's) weight may fluctuate:

1. Women are looking for quick fixes. They want to get into shape for an event or a pair of jeans. The mind-set isn't for long term.

2. We want to make it easy so we take pills, powdered supplements, stimulants and laxatives. These are not long- term solutions and could be potentially dangerous.

3. It's about weight, not health. It shouldn't be that we're looking to lose weight, it should be that we're looking to be healthy.

4. When people decide to lose weight, they go to the gym 7 days a week. It's the all-or-nothing approach. It's unrealistic to maintain this level of intensity.

5. We try to lose weight for other people and not ourselves. We have to make decisions like this for own well-being, or it will never work.

Diane says it's best to embrace the goal of getting healthy for the long term. In most cases, the weight loss will follow as an added bonus.

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