Singer Kelly Clarkson‘s divorce from estranged husband Brandon Blackstock has been a long process since she first filed in June 2020. Why did they split? A source told Life & Style the A-lister and talent manager “clashed” before their uncoupling.

Hunkering down at home amid the coronavirus pandemic in 2020 seemed to be the final straw. The source said Kelly “hated having to self-isolate” Brandon. “They [hadn’t] been getting along for a while and clashed on so many levels.”

On June 4, 2020, the “Heartbeat Song” artist filed for divorce from the agent, according to court documents obtained by Life & Style, and cited “irreconcilable differences” as the reason for their split. “They’ve grown apart over the years and being in lockdown together heightened their problems,” added the insider.

Kelly, Brandon and their two children — daughter River and son Remington — chose to practice social distancing at their “Vintage Valley” ranch in Montana.

The “Miss Independent” artist and talent manager tied the knot in 2013 and would have been celebrating their seven-year wedding anniversary in October 2020. According to the source, Kelly “took out her frustration” on Brandon during quarantine, forcing him to “get out of the house” as much as possible. Eventually, the Voice coach “couldn’t take it anymore,” says the source.

Kelly Clarkson 'Hated' Isolating With Brandon Blackstock Ahead of Divorce
Evan Agostini/Invision/AP/Shutterstock

In December 2019, it appeared as though Brandon and the American Idol alum were trying to keep the spark alive. While speaking with season 14 of The Voice winnerBrynn Cartelli, Kelly admitted she and Brandon had a very healthy sex life.

“I was single for many years, so … I have children and how one makes children is generally what I do before bed,” the Grammy winner laughed during an episode of The Kelly Clarkson Show.

Prior to meeting Brandon in 2012, Kelly thought she was “asexual,” according to a 2017 interview with People, adding that she’d never been “turned on” like that.

“This isn’t a downer to anybody I dated before him, but I’m just going to be real: I never felt like, honestly, sexually attracted to anybody before him,” Kelly explained. “And I’m not downing my exes. You know, everybody’s different. But there was something about him.”