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The Revlon Concert For The Rainforest Fund - Songs From The Silver Screen - Auction Arrivals

NEW YORK, NY - APRIL 03: Trudie Styler and Sting arrive to the auction following the Revlon concert for The Rainforest Fund at The Pierre Hotel on April 3, 2012 in New York City. (Photo by Dimitrios Kambouris/WireImage)

Earth Day: Stars and Their Environmental Causes

We're celebrating Earth Day by taking a look at stars who are taking an active role in protecting our planet with their charitable work.