9. Carrie Underwood
In 2011, Underwood passed Kelly Clarkson as the top earner of all time among “American Idol” alumnae, having sold more than 12 million albums and 18 million digital tracks. She inflated those numbers even further in 2012 with the release of her fifth No. 1 country album, "Blown Away," and her 11th No. 1 country song, "Good Girl." —Jeff Royer
(Photo: Christopher Polk, Getty Images)
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