Barbra Streisand's voice makes my eardrums pop.
She's not what she use to be, and even then she was not as good as this woman. Streisand had an teriffic voice and there are loads of recordings over the last forty-five years to prove it, but she couldn't hold a candle to this Susan Boyle.
Streisand greatly relied on packing her more difficult notes through her nose. If you have ever seriously sang, you know what I mean. It's an effective way to maintain tone, key, etc. during the melodies that require more than you have to offer, but in the end - talent-wise - it's a cop-out.
Susan Boyle, for what I've heard so far, does not ever put it through the nose. She's got the pipes to blow it out the big hole with a pure and clear sound that almost defies the human instrument. Susan has an amazing talent.