Listen to The Allman Brothers Band

Trace Adkins, Vince Gill, and Martina McBride are among the country stars showing their appreciation for Gregg Allman.  The country stars were among the participants in "All My Friends: Celebrating the Songs and Voice of Gregg Allman," which took place in Atlanta Friday night. says Adkins contributed two songs to the event, including Allman's hit "I'm No Angel." And before he left the stage he told the crowd the show was "the coolest thing" he'd "ever done" in his career. 

Martina performed on her own as well as with Train's Pat Monahan, while Gill teamed up with Zac Brown and the night's guest of honor. 

Eric Church and Brantley Gilbert also took part in the all-star event, which also featured Jackson Browne, Dr. John, Sam Moore, and others -- including Gregg's own Allman Brothers Band. 

Photo Credit Getty Images