Rosie, Kristen, Emma and more get in touch with their inner hippies at the annual music festival
Credit: VLNY/Zodiac/Splash News Online
Updated: Monday Apr 23, 2012 | 01:00 PM EDT
By: Alex Apatoff & Kate Hogan
More from PEOPLE
See More News
9 of 21
Joining the pants party with her high-waist floral pair, the actress makes a surprise visit and fits right in with her layered necklaces and oversize sunnies.
Copyright © 2014 Time Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited.