Melinda Doolittle, ''For Once in My Life'' (Season 6)
Melinda Doolittle was undoubtedly right at the top. The judges looked stunned as she belted out ''For Once in My Life,'' and were speechless for a moment when she finished. Simon called her a ''brilliant singer,'' and repeated himself in case we misunderstood the first time. —ungentlemanly conduct

Melinda Doolittle's audition: Watch it on YouTube