What former "American Idol" champion switched over to the competition, becoming a judge on "The Voice"?

What former “American Idol” champion switched over to the competition, becoming a judge on “The Voice”? – Kelly Clarkson is the answer of What former “American Idol” champion switched over to the competition, becoming a judge on “The Voice”? because Kelly Clarkson rose to fame in 2002 after winning the first season of American Idol. … Read more