Kelly Clarkson says life's 'been a little of a dumpster' since filing for divorce - CNN

"I don't know how people go through that without having some kind of outlet because it is the worst thing ever for everyone involved."

Clarkson cited "irreconcilable differences" in her divorce filing from Blackstock, a music manager with whom she shares two young children, River Rose and Remington Alexander.

Clarkson and Blackstock have remained cordial publicly and she thanked him this year after she won a Daytime Emmy for best entertainment talk show host for the first season of "The Kelly Clarkson Show."

She told "Today" she's been channeling her emotions into her new album, set to be released next year, which she described as probably "the most personal one I've ever released."

"And the whole record is basically every emotion you experience from the beginning of a relationship to the end of what it is now or where it is now, and it's been very therapeutic for me," Clarkson said.

It was announced in August that "The Voice" coach would be filling in for Simon Cowell as a judge on "America's Got Talent" while he recuperated from back surgery following a fall from an electric bike.

Cowell was a judge on "American Idol," the show which made Clarkson famous in 2002 after she became its first-ever winner.