However, the 40 per cent rule would rule out several celebrity wardrobe choices, including actress Elizabeth Hurley's famous safety pin dress, designed by Gianni Versace.

The reality star does a little time traveling in style, mixing Old Hollywood-glam pin curls and red lips with a modern-vixen chocolate mini, Kwiat jewels and major platform sandals.

If you're buying a celebrity dress from a reputable dealer or auction house, they will let you know about the damages before you purchase the dress.