Clarkson will appear on the upcoming "Battle of Champions" season of the NBC singing competition series alongside Adam Levine and John Legend

Fellow "American Idol" alum Jennifer Hudson temporarily filled in for Clarkson following her ex-husband's death. Kelly Clarkson is returning to The Voice after taking a brief absence from the reality singing competition following the death of her ex-husband Brandon Blackstock.

One American Idol alum is helping out another. Jennifer Hudson is stepping in for Kelly Clarkson as a coach on the upcoming Season 29 of NBC’s The Voice following the death of Clarkson’s ex-husband Brandon Blackstock earlier this month.