American Idol is back tonight for its 11th season! Can you believe it has been 10 seasons already? Before the new season kicks off with another round of wacky singers, amazing voices and plenty of drama, let's take a look back at best performances from each of the 10 winners.OK! NEWS: AMERICAN IDOL WINNER KELLY CLARKSON SET TO MENTOR CONTESTANTS ON THE VOICESeason One:American Idol premiered in the summer of 2002, and for most of the season, it was all about curly haired Justin Guarini, but then out of nowhere on "Big Band ... Read More >>