5. BO BICE, ''In a Dream'' (Season 4)
Talk about cojones! Late in Idol's fourth season, when viewers knew things were coming down to a photo finish between country gal Carrie Underwood and Bice, the shaggy Alabama rocker set down the mic stand and delivered a searing a capella rendition of ''In a Dream,'' a little-known ballad by Badlands. Sure, Bice ultimately took home the silver and his sales haven't come close to Underwood's multiplatinum heights but it's impossible to forget (and it'd be criminal not to applaud) his bold artistic choice, which doubled as a nod to Idol's accompaniment-free audition rounds.
We revisit the classic performances all contestants try to measure up to -- see which of your faves make the cut