She can look good at her age because it looks like she lives a pretty healthy lifestyle. She works out regularly, eats rights, and takes good care of her skin. Also all that plastic surgery (plus I'm assuming some botox regiments) helps her look young. She's also never had any children so her body is still in pretty tip top shape.
While we discuss her here I will admit her customer service has always been top notch and she makes very good content. Never been disappointed in her videos or photos. She obviously knows the business and is very professional. All in all she seems like a pleasant person.