Ashlee Simpson believes plastic surgery should be a "personal choice".The young star, who refuses to deny or confirm reports she had a nose job in April 2006, insists if people want to change their appearance it's fine as long as they do it for themselves. Ashlee, 22, told Harper's Bazaar magazine: "I don't get bothered by people saying what they say. I'm a happy person and I'm happy with my looks. I'm not an insecure person."I believe if somebody chooses plastic surgery it should be for themselves, not for anyone else."It was claimed last year that Ashlee turned to surgery because she felt like an "Ugly duckling" next to her elder sister, singer-and-actress Jessica, 26. Ashlee's third album is scheduled for release before the end of the year.