10. MIKALAH GORDON, ''Love Will Lead You Back'' (Season 4)
Bad enough that the spunky Las Vegas teenager inexplicably turned Taylor Dayne's big ballad into a funeral dirge, but even worse, her voice kept cracking like Humpty Dumpty hitting the sidewalk. By the time poor Mikalah grabbed the mic off its stand and began to approach the audience, it almost felt like a threat.