Dolly Parton's Insomnia Causing Rift In Marriage: 'It Drives Carl Crazy!'

Dolly Parton's a virtual zombie these days, as either she can't get to sleep or she wakes up too early, and RadarOnline.com has learned exclusively it's causing havoc in her home life with husband Carl Dean.

"She hasn't had a restful slumber in years," an insider revealed to RadarOnline.com. "That's a huge reason why she and Carl have separate bedrooms."

As RadarOnline.com readers know, Parton and Dean have been married for 52 years. They met when Parton was just 18 and eloped in 1966 after her record company told her they didn't want her to get married.

After five wonderful decades, the two renewed their vows two years ago in a "beautiful ceremony" inside their Nashville home with all their friends and loves ones.

But lately, a stressed-out Parton has had trouble continuing her fairy-tale life.

"Her insomnia has gone from bad to even worse lately," the insider confessed. "Her weird no-sleep pattern drives him crazy and she's up at 2am cleaning house or playing guitar and writing songs."

Parton has had a heavy-hearted year, first saying goodbye to longtime friend and rumored lover Burt Reynolds in October, and just a few days ago suffering the tragedy of losing her brother Floyd to an unknown mystery illness.

The sudden losses could be causing her to lose some much-needed rest and relaxation time. And friends fear the country music legend could be running out of options.

"She's tired from lack of shut-eye and wired from drinking coffee all day," the insider admitted. "This isn't healthy, but she's tried everything, even hypnotherapy, but nothing seems to have worked."