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The Britain's Got Talent runner-up received the first instalment of her royalties from her best-selling debut album in April and it amounted to a whopping £4million.
'I don't know what to with the money,' she says.
Susan, 49, has only made one big purchase in the last year.
'I've bought a house and I'm keeping my old one purely for sentimental reasons,' she says. 'It was my mother's.'