There were just as many A-listers in the audience as there were onstage, as Zac Efron & Vanessa Hudgens, Pink, Kate Hudson and others headed to the annual music festival
Updated: Monday Apr 19, 2010 | 03:30 PM EDT
By: Cara Lynn Shultz
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Beating the heat (which hovered near 100º at times) in her shades and fedora, Anne Hathaway steps out arm in arm with beau Adam Shulman.
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