I listened to the KFRG interview and have gleaned the following from Paul Tollett being interviewed. I was surprised they are already stating who on which days.
Friday, April 27th
Jason Aldean
Alabama
Sara Evans
Saturday, April 28th
Miranda Lambert
Blake Shelton
Luke Bryan
Sunday, April 29th
Brad Paisley
Martina McBride
The Band Perry
Listen to the whole interview on their site and they discuss the side stages as well.

