'American Idol' Winner Auditions: High Notes & Humble Beginnings (VIDEO) by David Ciminelli Having waited tables or shoveled cow poo before becoming pop stars, famous people often don't care to rehash history. But when 'American Idol' is the vehicle that launched that superstar career, it's difficult to obscure the past with the sparkle of a Grammy and the gleam of platinum records, especially when the show's audition clips are some of the most fun viral videos out there. Form...