Maria Callas - Una voce poco fa
Hard to forget all the attendant biographical detail - early struggles with weight, marriages, divorces and so on, that led to those later reclusive years and left us with the abiding image of a tortured soul. But do try!
No matter what the purists say about doubtful intonation or tone production, when you watch her in action you'll find it hard to disagree that this was a truly wonderful 'performer' - capable of convincing the most reluctant listener that any unlikely operatic plot might just be credible.
She doesn't even need a set - see how she delivers 'Una Voce Poco Fa' (that cavatina again...) with that magical, 'ma...' moment!
Watch it on YouTube: http://www.youtube.com/watch?v=NuEmJZzuG9U&feature=related