The Bonnaroo Music Festival has just released the fourth of its performer announcements. The six new artists carry varied perspectives and intents. The Followill Family returns, as Kings Of Leon make their second successive Bonnaroo appearance. On the more contemplative side, from Assembly of Dust will debut at the fest. Other additions include Blue Merle (once again back for a Roo two), DJ Krush, Amos Lee and RJD2. Bonnaroo will return to Manchester, TN on June 10-12.