Singer Melissa Etheridge performs during a rehearsal at the 2008 Democratic National Convention in Denver...
Singer Melissa Etheridge performs during a rehearsal at the 2008 Democratic National Convention in Denver, Colorado, August 27, 2008. U.S. Senator Barack Obama (D-IL) is expected to accept the Democratic presidential nomination at the convention on August 28. REUTERS/Brian Snyder (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)