Season 2 - Clay Aiken
Aiken is the most successful second-place "Idol" to date. The singer was the runner-up on the fifth season of NBC’s "Celebrity Apprentice." He recently released "Steadfast," an album of songs only sung in concert, in March of 2012. —XFINITY Entertainment Staff (Photos by Vince Bucci, Mike Coppola/Getty Images)
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