The shocked expression on Usher’s face said it all. His disbelief that Kris Thomas is a man was echoed by two of the other judges as well, and not without cause. Thomas is a young man who sang a Whitney Houston song (Saving All my Love For You) in the original key, hitting the highest of Whitney’s high notes. While another singer would have keyed it down or not attempted the song at all, Kris Thomas altered nothing except the gender of the performer.The American listening public is no stranger to male falsetto. When performing his recently release hit, Suit and Tie, at the Grammys, Justin Timberlake sang nearly entirely in falsetto. But even at his highest, Timberlake doesn’t touch the notes that appeared so easy for Thomas, who landed at least three steps higher on the scale.