Ageless Hollywood star Jamie Lee Curtis has posed topless on the cover of AARP magazine in a bid to persuade older women that they can remain beautiful if they take care of themselves.The Trading Places star, who turns 50 later this year, bares her shoulders and poses with grey hair on the front of the May issue, although her nipples are kept out of sight. She tells the publication, "I want to be older. I actually think there’s an incredible amount of self-knowledge that comes with getting older."I feel way better now than I did when I was 20. I’m stronger, I’m smarter in every way, I’m so much less crazy than I was then… Getting older means paring yourself down to an essential version of yourself." Curtis also refuses to dye her hair. She adds, "I’ve let my hair go gray. I wear only black and white. Every year I buy three or four black dresses that I just keep in rotation."