8. Kimberley Locke, ''Somewhere Over the Rainbow'' (season 2)
Idol's six-season history is littered with big-voiced divas straining to hit their glory notes. But none have been showier — or more successful — than third-place finisher Kimberley's soaring yet controlled reinterpretation of the Wizard of Oz classic. Forget Simon's backhanded compliment about Kimberley championing ''vocals over image'' — any way you look at it, the woman's audition is a beauty.

Kimberley Locke's audition: Watch it on YouTube