London, Aug 13 - Australian model Miranda Kerr has revealed that she lives in fear of falling off the ramp while attempting a catwalk.

The 26-year-old beauty who has starred in advertising campaigns for Victoria's Secret and Maybelline New York cosmetics says strutting down 'slippery' surfaces and posing in outlandish outfits is daunting, reports fametastic.co.uk.

'Every catwalk is different. Sometimes they are really slippery. Some have glitter that's a couple of inches thick. It gets all up in your toes. It's a little bit messy - glitter flying everywhere,' she said.

Kerr, who is dating actor Orlando Bloom, says the worst part of her job is having to look good at all times - even in extreme weather conditions.

She said: 'If it rains we still have to work and that can be miserable. It's hard to look sexy in the rain.'