America's sixth Idol, Jordin Sparks, turns 21 today! When the Glendale, Arizona native auditioned for American Idol, she was only 16 years old. To date, Jordin remains the youngest American Idol winner. Three years ago, Jordin released her self-titled debut album, which was certified Platinum by the Recording Industry Association of America (RIAA). The album included the hot singles "Tattoo," "No Air," and "One Step at a Time." Jordin became the first American Idol alum to sing The National Ant...