Country singer Mindy McCready has died at age 37, NBC News has confirmed. The cause of death "appears to be a single self-inflicted gunshot wound," the Cleburne County (Ark.) Sheriff's Office said in a statement.

McCready scored her biggest hit in 1997 at the age of 21 with the song "Guys Do It All The Time." Other popular hits included "Ten Thousand Angels" and "A Girls Gotta Do (What a Girls Gotta Do)."

Country singer Mindy McCready dead at age 37