Another standout performance from a Brit on Britain's Got Talent. I guarantee you haven't heard a male voice like this before. Listen to Greg Pritchard as he sings Nessum dorma. I'm stealing this from Woman Honor Thyself, who explains Nessum dorma like this:
Nessun dorma (English: No one shall sleep) is an aria from the final act of Giacomo Puccini’s opera Turandot, and is one of the best-known tenor arias in all opera.You can read the lyrics at Woman's and you can watch the video there or here.
It is sung by Calaf, il principe ignoto (the unknown prince), who falls in love at first sight with the beautiful but cold Princess Turandot. However, any man who wishes to wed Turandot must first answer her three riddles. If he fails, he will be beheaded.