He and his wife lost their unborn daughter in June.
(Undated) -- Walker Hayes is opening up about the loss of his baby girl, who died shortly after birth three months ago.
The country singer tells "People" magazine his wife, Laney, had an uneventful pregnancy until her uterus ruptured in June. Laney was rushed to the hospital where she underway an emergency C-section, but the baby couldn't be saved.
Walker says he wasn't even sure if Laney was going to make it; he called it the worst day of his life.
Oakleigh Klover would have been the couple's seventh child.