Celebs and charity: the ugly truth: while some Hollywood heavy-hitters are truly dedicated to doing good deeds, others use (and abuse) worthy causes for their own gain. Wait until you read these despicable stories.(WHAT YOU'RE DYING TO KNOW ABOUT)

* In Tinseltown, even if you've screwed around on your partner, cheated on your taxes, or been nailed for DWI, the moment you get involved with a charity, you suddenly qualify for sainthood. Since philanthropy trumps bad behavior, stars jump at the chance to attach their names to a worthy cause. But often that's all they're giving--a name.

While some celebs are genuinely giving, others are all about unfulfilled promises and diva demands that can make the charities they claim to champion actually lose money. And at the very least, they give the people who plan benefits a major headache. Listen in as real philanthropists share their shocking stories of working with famous, bogus do-gooders.

Ditching Out on the Disabled

DO NO-GOODER An Actress

I run this big auction every year for my son's school, which is for children with severe learning disabilities. Since I'm an actress, I lean on all of my friends to donate things from their movies. We raise a fortune every year, and the money goes toward tuition for kids whose parents can't pay. Over the years, a lot of my friends have come and auctioned off dinners with the cast of their show or walk-on parts on their series. I cover the entire cost of the auction myself.

Two years ago, a friend told me that she could get this one huge actress to come. I knew that if she showed up, we could auction off photos with her and make a lot of money. I called her manager, and he said she really wanted to help the kids and would come. We were thrilled, and we sold more tickets than usual because people were so excited that she was going to be there.

A couple of weeks before the event, her manager called and asked if I could send a car to pick her up at the airport. "No problem," I told him. Then the Wednesday before, her people called and demanded that I put her up at the Peninsula Hotel. I said ...