Earlier this week, Clarkson appeared as a guest judge on “America’s Got Talent,” filling in at the last minute for Simon Cowell, who was hospitalized for injuries sustained in an electric bicycle accident.
Responding to news of Clarkson’s surprise appearance, the Twitter user suggested that the star is no longer the “good old country girl we fell in love with.”
“No wonder her marriage didn’t work,” the since-deleted tweet read. “Surprise she has time for her kids.”
Clarkson, a three-time Grammy winner, retweeted the criticism with strong words of her own.
“This can’t be who you are deep down,” she wrote. “I have more faith in your heart. Aim higher please.”
Clarkson filed for divorce from Blackstock in June. The couple share daughter River Rose, 6, and son Remington Alexander, 4, together.
The singer-songwriter has yet to speak about her marital status publicly. Nonetheless, she set tongues wagging days after news of her separation broke by performing Aretha Franklin’s 1967 rebound anthem, “Chain of Fools,” on her daytime talk show.