Reba will join Chance the Rapper, Kelly Clarkson, Niall Horan and Blake Shelton for the Season 23 Knockouts.
The bands have teamed up with Nugs.net to offer fans a chance to live stream the sold out show in Athens, GA
The wave of new acts join Bonnie Raitt and Nathaniel Rateliff in playing June's Festival of Americana in Kent, England.
Joining Charles as an opener on Zach's upcoming tour will be J.R. Carroll, Trampled By Turtles and Jonathan Peyton.
They'll be joined by the likes of The War and Treaty, Elvie Shane, Rattlesnake Milk and Wild Child at the March festival.
The country star rejoins Mike Dungan and Cindy Mabe, who signed Paisley to Arista when he was just starting out.
