The multi-week event is set for October.
The "Wranglers" singer will welcome several friends and fellow musicians, with a full artist lineup yet to be revealed.
"This was an incredibly heartbreaking decision to make," organizers wrote.
Reba joined the fun for a finale of "Mama's Broken Heart," "Fancy" and "Gunpowder & Lead."
Church did a one-of-a-kind, gospel-oriented show Friday night (April 26) that had fans feelings lots of different things.
The pair closed Cauthen's set with their duet at the California country music fest's opening night.
The festival returns to Larmer Tree Gardens between August 29 and September 1
"I love u so much and I’ll make it up to you and be back better than ever very soon," she wrote on social media.
