As I said, lots of JLo-level celebrities with all her wealth, resources and good genes, whatever their gender, do not look half as good at 50. JLo has taken excellent care of herself for many years and it shows. At a certain point, the way you've been taking care of your body (or abusing) catches up with you; in JLo's case, it's paying off. And this whole idea of "Oh, if I had what she has, I would look that amazing as well!" You wouldn't. Most celebrities don't.
Frankly, I detect a strong undercurrent of misogyny in all the complaints about JLo daring to brag about how hot she is (the audacity!) and all her projects, especially when most SNL hosts are there, you know, to promote their projects. Chance bragged about welcoming a second daughter and made sure to mention his previous donation to the Chicago educational system, and everyone thought this was adorable. Harry Styles talked about his musical career, and no one begrudged him that. But you know, how dare a woman take pride in anything she has accomplished. She's allowed to have great success with Hustlers and lots of opportunities like performing at the Super Bowl, but how dare she talk about it. She's allowed to be so hot at 50 that SNL can write a whole sketch about how much more gorgeous she is than two pretty actresses 15+ years her junior (Aidy and Kate), but how fucking dare she rub it in. That bitch!
There's "great" and then there's "sufficiently hot to have multiple SNL sketches based on how hot you are." They're nowhere near the latter category.