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. Aiken is currently running for Congress in North Carolina's 2nd district. Last month, he won the Democratic primary, and will now move on to the general election this November. —XFINITY Entertainment Staff (Photos by Getty Images)
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