Eva Vasquez
Special to CNN
It's hard to think about humanitarian travel without picturing Angelina Jolie and other high-profile volunteers. But how much do celebrities contribute to the growing appetite for volunteering away from home and is it all positive?
One thing is for sure, in our celebrity-obsessed culture many organizations see a benefit to having celebrities represent their causes.
Jolie is a good will ambassador for UNCHR, also known as the United Nations Refugee Agency, and UNICEF has a number of celebrity ambassadors, including Liv Tyler, Sarah Jessica Parker and Clay Aiken.
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Jolie does because one can tell she is real, committed, but most of the other celebrities don't because we usually can tell it's a publicity stunt. Take George Clooney, Madonna, both participate, show up to well orchestrated, well chosen volunteer, help projects.