1. Leonardo DiCaprio Leonardo DiCaprio

    Donated 1 million dollars to the Haiti Relief Fund and continues to executive produce "Greensburg."

    Leo's Eco-Site »

    Leo's Official Site »

    Leo's Fansite »

  2. Matt Damon Matt Damon

    Co-founded to bring people clean water. Appeared on Entourage to promote the charity OneXOne Foundation. He will also play in the World Series of Poker "Ante Up for Africa" event in July. »

    Matt's Fan Site »

  3. Jessica Biel Jessica Biel

    Climbed to the summit of Mount Kilimanjaro as part of the Summit On The Summit. Summit On The Summit raises awareness about the clean water crisis happening not only in Africa but around the world.

    Summit On The Summit »

    Jessica's Fansite »

  4. Salma Hayek Salma Hayek

    Traveled to Sierra Leone visiting health clinics. At one point she breast-fed a hungry week-old baby whose mother could not produce milk.

    Salma's Fansite »

  5. Natalie Portman Natalie Portman

    Hosted a special charity event for the film "Hungry in America," donated signed Star Wars collectors items for an Earth Day auction, and helped launch the Village Banking Campaign.

    Natalie's Official Site »

    Natalie's Fansite »

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