ATLANTA, GA - JANUARY 10: (EXCLUSIVE COVERAGE) Warren Haynes, Pat Monahan, Martina McBride, Devon Allman, Eric Church, and Zac Brown rehearse for All My Friends: Celebrating the Songs & Voice of Gregg... more 
ATLANTA, GA - JANUARY 10: (EXCLUSIVE COVERAGE) Warren Haynes, Pat Monahan, Martina McBride, Devon Allman, Eric Church, and Zac Brown rehearse for All My Friends: Celebrating the Songs & Voice of Gregg Allman at The Fox Theatre on January 10, 2014 in Atlanta, Georgia. (Photo by Andrew H. Walker/Getty Images) less 
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Getty Images | Photo By Andrew H. Walker / Getty Images
Fri, Jan 10, 2014 7:11 PM EST