From Vanessa Hudgens and Hilary Duff to "Robsten" and Joshua & Diane, celebs show off peace, love and good vibrations at the California music festival
Updated: Monday Apr 15, 2013 | 12:00 PM EDT
By: Kiran Hefa & Alison Schwartz
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What's groovier than free hugs? Duff's sunglasses, for one, which kept her undercover as the music extravaganza kicked off Friday.
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