FILE - In this Aug. 28, 2008 file photo, singer Sheryl Crow performs on the last day of the Democratic National Convention at Invesco Field in Denver. Fewer celebrities is an emerging

 

              FILE - In this Aug. 28, 2008 file photo, singer Sheryl Crow performs on the last day of the Democratic National Convention at Invesco Field in Denver.  Fewer celebrities is an emerging
FILE - In this Aug. 28, 2008 file photo, singer Sheryl Crow performs on the last day of the Democratic National Convention at Invesco Field in Denver. Fewer celebrities is an emerging theme for the Democratic Convention this year. (AP Photo/Charles Dharapak)