4. Paris Hilton – One thing we'll never know about the socialite, multi-millionaire heiress airhead (we're not jealous, honest) is what her singing voice actually sounds like. On her 2006 eponymous debut album her vocals – which could sound like a mouse fart for all we know – were swathed in so much over-production and sickly-sweet gloss that she came out sounding even more fake than usual. In fact it gave us great pleasure when the manufactured piece of pop diarrhoea flopped and Paris concentrated on her other career, erm, hanging out at bars and stuff.

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