FILE - In a Sunday, April 25, 2010 photo, Gregg Allman performs with the Allman Brothers Band at the New Orleans Jazz and Heritage Festival in New Orleans. ((AP Photo/Gerald Herbert))
Gregg Allman performs at Hard Rock Live! in the Seminole Hard Rock Hotel & Casino on January 4, 2015 in Hollywood, Florida.(Photo by Jeff Daly/Invision/AP) (Jeff Daly/Invision/AP)
Gregg Allman, left, and Willie Nelson perform together at Farm Aid on Randall's Island Sunday, Sept. 9, 2007 in New York. (AP Photo/Jason DeCrow) (AP)
** FILE ** Gregg Allman of the The Allman Brothers Band performs at Farm Aid on Randall's Island in this Sept. 9, 2007, file photo in New York. (AP)
In this photo provided by StarPix, MSG Entertainment announced that The Allman Brothers Band will return to the Beacon Theatre and perform eight shows beginning March 10 2011. (AP)
Musician Gregg Allman of The Allman Brothers band performs at Eric Clapton's Crossroads Guitar Festival 2013 at Madison Square Garden. (Evan Agostini/Invision/AP)
File- This Oct. 13, 2011, file photo shows Gregg Allman performing at the Americana Music Association awards show in Nashville, Tenn. (ASSOCIATED PRESS)