Brooks & Dunn lead singer, Ronnie Dunn walked off the stage during an encore performance of the band's 1991 hit song, Boot ...

During a concert in Indianapolis on Thursday, Ronnie Dunn of Brooks & Dunn was singing the band's iconic hit, "Boot Scootin' ...

Ronnie Dunn, one half of the country music duo Brooks & Dunn, abruptly left the stage during a concert in Indianapolis. While a representative for the band said Dunn was ill, the singer himself ...

Brooks and Dunn singer Ronnie Dunn surprised fans when he abruptly left the stage during an encore at an Indianapolis concert ...

The Country Music Hall of Fame duo and Oscar-nominated actor participated in a panel at the National Cowboy Museum in OKC ...

During Brooks & Dunn's time onstage that night, fans noticed that Dunn was flagging. His usually-robust voice cracked during some of the high notes, and some noted on social media that the singer ...

Country music icon Ronnie Dunn has fans concerned after the country star abruptly walked offstage. During a concert in Indianapolis on Thursday, the 71-year-old Brooks & Dunn member was singing ...

Country music icon Ronnie Dunn has fans concerned after the country star abruptly walked offstage. During a concert in Indianapolis on Thursday, the 71-year-old Brooks & Dunn member was singing ...

Before they got started, Kix Brooks and Ronnie Dunn, of the hall of fame country ... a Grammy-winning team — they started out as solo singer-songwriters who were paired up in 1990 by Oklahoman ...