Country singer Mindy McCready, 37, was found dead today in an apparent suicide, according to reports.

Andrea Canning, a reporter with NBC Dateline, Tweeted, “Just got a call from Mindy McCready's best friend that she shot and killed herself this evening. My heart breaks for her two boys. RIP”

Official confirmation of the death and the cause of death has not been made, but E! News reports the singer's body was found in Heber Springs, Ark. today, just a day after her father Tim left to return to his Florida home after an extended visit with his daughter.

A source tells E!, "She was in good spirits and seemed to be fine," when her father left. Neighbors reportedly heard gunshots at her home today and a source tells E!, "She shot herself and the dog."

After McCready's boyfriend David Wilson, 34, died of gunshot wounds just over a month ago, the singer was involuntarily admitted to rehab and was struggling with a bout of recurring substance abuse, according to her father:

"Since boyfriend [Wilson] shot himself she has been in bed for 3 weeks. Sleeps all day. Drinks all night and is taking Rx drugs. Not bathing or even helping take care of her 2 children," her father testified, according to court documents.

McCready had lost custody of her two sons - Zander, 6, and Zayne, 9 months -- at least temporarily, after a court deemed her an unfit parent just after Wilson's death.

An investigation into Wilson's death is still incomplete, though McCready had claimed it was suicide from a self-inflicted gun wound. She had balked the suggestion she could have murdered her boyfriend, saying, on NBC's Dateline on Jan. 29, "He didn't just touch my heart, he touched my soul."

She later told E! News she was drinking "too much alcohol because she was still mourning David's passing."