Though rebel rocker Michael Franti's sound may have changed, his message hasn't. courtesy of the artist hide caption

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Michael Franti and Spearhead. courtesy of the artist hide caption

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Michael Franti and his Spearhead ensemble perform on the "Which" stage at the Bonnaroo Music and Arts Festival in Manchester, Tenn., on Friday, June 11, 2010. Laura Fedele hide caption

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