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Sean Penn, Charlize Theron and Pharrell Williams

Sean Penn and Charlize Theron pose with Pharrell Williams at Bionic Yarn, G-Star and Hennessy Privilege Celebrate Pharrell Williams and his Oscar nominated single, "Happy" on February 27, 2014 in Los Angeles, California. (Photo by Dimitrios Kambouris/Getty Images)

Stars Attend Oscar Pre-Parties

Yahoo Movies

Stars attend multiple parties around Los Angeles celebrating the upcoming 86th Academy Awards on March 2, 2014.