|Brandon Blackstock and Kelly Clarkson|
The 38-year-old filed court papers to end the marriage under her married name Kelly Blackstock on June 4 in Los Angeles, according to The Tennessean.
The first "American Idol" champion, Clarkson married Blackstock in 2013. They have two children: daughter River, 5, and son Remington, 4.
Blackstock, 43, is Reba McEntire's former stepson. Clarkson first met Blackstock when he worked as Rascal Flatts' road manager.
"Kelly Clarkson and Brandon Blackstock hoped things would work out between them, but quarantine only made things worse," according to an insider.
"Kelly and Brandon had been having problems for several months and were making a conscious effort to work things out. They both hoped quarantining away from L.A. in Montana would help them work things out in their marriage, but instead the change in environment was actually detrimental," the source added. "Kelly knew she just needed to follow her heart and finally realized divorce was her only option."