Photo by Miro Vrlik Photography/Shutterstock

Love ’em or hate ’em, celebrities have louder voices than us mere mortals. From musician Pharrell Williams, who thinks fashion can be a tool for protecting the planet, to supermodel Christy Turlington, who says that the preventable death of one garment worker is still one too many, here are seven bold-faced names who used their fame to amplify their message.

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