Which American Idol runner-up will end up having the most successful career in entertainment? (Current age shown) (poll 1640776)

Which American Idol runner-up will end up having the most successful career in entertainment? (Current age shown)

Justin Guarini, 30

Clay Aiken, 30

Diana DeGarmo, 21

Bo Bice, 33

Katharine McPhee, 25

Blake Lewis, 27

David Archuleta, 18

Adam Lambert, 27

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See this poll on: https://poll.fm/1640776/embed