Simpson shines on stage at the California State Fair in Sacramento. Plus: Brad Pitt, Beyoncé and Solange Knowles, Pete Wentz and more

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CHEERING SECTION

Paula Abdul plays cheerleader at the opening day of the U.S. Open in Flushing Meadows, N.Y. The American Idol judge will have more girl power on her side when songwriter Kara DioGuardi joins the judges' panel when the show returns in January.