13. TIM URBAN, ''Under My Thumb'' (Season 9)
Putting aside the fact that the Rolling Stones' sexually aggressive ditty has no place on the supposedly family-friendly Idol stage, Tim's emotionally tone-deaf, reggae-fied(!) rendition was cataclysmically jarring. We'll never forget the sound of the polite Texan straining his voice and reciting the lines ''Under my thumb/ The squirming dog who's just had her day'' as if he were singing ''Kumbaya.'' Yowza.

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