Widespread Panic frontman John Bell sat in with the Zac Brown Band last night during their headlining performance at the Southern Ground Music and Food Festival in Charleston, SC. The singer/guitarist joined the group for back-to-back renditions of Widespread Panic’s “Ain’t Life Grand” and “Blue Indian,” as well as a take on Bill Withers’ “Use Me” that also featured Donald Dunlavey.

Earlier in their set, the Zac Brown Band got some help from Nashville star Clare Bowen on versions of Ray LaMontagne’s “Jolene” and Van Morrison’s “Into the Mystic.” The show included a number of other covers, including takes on Metallica’s “Enter Sandman,” Steve Young’s “Seven Bridges Road,” James Taylor’s “Carolina In My Mind” and “The Frozen Man,” The Melodians’ “Rivers of Babylon,” Led Zeppelin’s “Kashmir” and Charlie Daniels Band’s “The Devil Went Down to Georgia.”

Southern Ground Festival continues today. Jason Mraz and Kenny Rogers are scheduled to sit in with Zac Brown Band during this evening’s show.