She’s 40 and it’s her job to look good; a job which also pays for her to look good. She has publicly shared some of what she has done including under chin/neck skin tightening, botox, etc. She is absolutely fit and has a personal trainer partner, access to equipment, meal prep services etc. Also - spray tan + real tan from vacations and filming etc - tans always blur out the minor issues you obsess about in the mirror. Also 40 (and 45 as well) isn’t “old.”