Winner:Kelly Clarkson Arguably the most successful Idol contestant to date, Clarkson was the first Idolto win a Grammy (She won two in 2006, and just picked up her third in 2013), and the native Texan's five albums have sold more than 25 million copies worldwide.
Runner-Up: Justin Guarini After his self-titled first album tanked, selling less than 150,000 copies, Guarini was dropped from his record label. He's now remembered mostly for his curly hair and smoldering eyes (hopefully, he and his costar won't be remembered for their 2003 film flop From Justin to Kelly).
Will the real season 1 Idol please stand up? Without question, Clarkson deserves her crown.