The singer was scheduled to appear at Miranda Lambert and Parker McCollum's Band Together Texas event taking place on Sunday to support those affected by the floods in July. However, Clarkson has canceled as a result of Blackstock's death last week, according to a since-expired Instagram Stories post from the concert's organizers.

Kelly Clarkson has withdrawn from her scheduled appearance at the Band Together Texas benefit concert following the death of her ex-husband and former manager, Brandon Blackstock. The

The post does not give any further details about her absence, but it does state "personal circumstances" as the reason for her decision. Fans know that Clarkson is grieving the death of her ex-husband, Brandon Blackstock, the father of her two children. He died on Aug. 7.