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The announcement of Mr. Blackstock’s death came one day after Ms. Clarkson said she would be postponing the remainder of her residency in Las Vegas.

By Alexandra E. Petri

Brandon Blackstock, a talent manager and the ex-husband of the Grammy Award-winning singer and Daytime Emmy-winning talk show host Kelly Clarkson, has died. He was 48.

His death, which followed a three-year battle with cancer, was announced on Thursday in a social media post by Starstruck Entertainment, a Nashville-based talent-management company owned by Mr. Blackstock’s father, Narvel Blackstock, at which Mr. Blackstock was an executive.