Keira Knightley reveals beauty addiction

London: Actress Keira Knightley says she is addicted to painting her nails in crazy colours for fun. Reportedly,the 29-year-old talked about her addiction.

"During filming, I am carefully made-up for weeks, so at the end of every film I love to go out and buy nail polish in the most absurd colours and paint my nails with them," she said. "Last time I chose yellow - which I don`t recommend. I looked like I and nicotine-stained fingers. I won`t repeat the yellow experience, but you can count on me to find an even crazier shade next time," she added.