Kelly Clarkson is responding to a social media user who speculated on why the star's marriage to husband Brandon Blackstock came to an end.

On Thursday, the Twitter user began by commenting about how Clarkson, 38, is filling in for Simon Cowell on "America's Got Talent" while the 60-year-old recovers from a back injury.

"Now Kelly is taking Simon's place," the person said before adding: "no wonder her marriage didn't work ... surprise she has time for her kids ... not the good old country girl we fell in love with ... it's all about Kelly being on tv ... and no one else ... no tears for her ... but for her kids."

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Clarkson responded several hours later.

"Wow. Shaming a woman who has a great work ethic, is a great mom, and who steps up and fills in when a friends [sic] asks for a favor because that’s actually what “good old country girls” do," she wrote "This can’t be who you are deep down. I have more faith in your heart."

54th Academy Of Country Music Awards - Red Carpet

Kelly Clarkson.  (Rich Fury/ACMA 2019/Getty Images for ACM)

In June, the "Since You've Been Gone" singer and talk show host filed for divorce from Blackstock, 43, according to court documents first obtained by The Blast.

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Clarkson cited “irreconcilable differences” as a cause for the divorce. Meanwhile, Blackstock, like Clarkson, is also reportedly seeking joint physical and legal custody of their children.

Brandon Blackstock and Kelly Clarkson. (Photo by Kevin Mazur/Getty Images for Critics Choice Association)

Brandon Blackstock and Kelly Clarkson. (Photo by Kevin Mazur/Getty Images for Critics Choice Association)

The divorce has yet to be finalized.

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The couple was together for nearly seven years and share two young children: a daughter, River, 6, and a son, Remington, 4. Blackstock also has two children from a previous relationship.