Best Busker in London?

I saw the most amazing busker today at Green Park station (in the walkway between the Piccadilly and Jubilee lines)

She had blond curly hair, 30+, and was wearing pink boots and was playing an acoustic guitar (sorry, all that info makes me sound like a stalker) but she had the most amazing voice.

Go and see her and give her some money...

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My favourite one is the person dressed as Sylvester the cat, I think he/she is usually at the Piccadilly or Oxford Circus one at the bottom of the escalator...

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