Cindy Crawford feels ''pressure'' to stay young.

The 50-year-old supermodel hates being constantly told she doesn't look the same as she did two decades ago but works hard to make sure she looks good for her age.

She said: ''I don't need everyone on Instagram pointing out that I don't look the same way I did when I was 20. I know that. Sometimes when you're in the public eye, it can be hard, and that's where you kind of have to work on yourself.

''No matter what I do, I'm not going to look 20 or 30. I just want to look great for 50. I exercise, eat healthy and take really good care of my skin. There's pressure on women to do the undoable, which is not age. But it's about looking great for however old you are, regardless of what that number is. I think the sanest way to age is to accept it.''

And Cindy - who has 15-year-old daughter Kaia and 17-year-old son Presley with her husband Rande Gerber - wishes she could have told her younger self not to be ''so hard on herself'' and hopes she can inspire younger women to be easier on themselves.

She added to New Beauty: ''The 50-year-old Cindy would tell the 30-year-old Cindy not to be so hard on herself. And, probably and hopefully, the 75-year-old Cindy would for sure be saying that to me. So I should get the message soon.

''No matter what you felt about your body at 30, at 50, you're going to be like, 'Ugh, if only I wasn't so hard on myself.' I think if my approach was to be less hard on myself, then maybe the world will follow it, too!''