Brothers Osborne, Blanco Brown, Travis Denning, Sara Evans, Caylee Hammack and Darius Rucker will perform during ACM Party For A Cause Aug. 23 at Nashville's Ascend Amphitheater. Proceeds benefit ACM Lifting Lives. Additional details – including host(s) and other performers – will be announced in the coming weeks; sign up for the free ACM A-List newsletter here. Tickets go on sale Friday (6/24) at Ticketmaster.