"We see women like Demi Moore, Goldie Hawn. These are women that look amazing with their long hair, and it's actually made them a lot more youthful," Harry says. "Like everyone says, 40 is the new 20. Why are we aging ourselves if we don't have to? I think long hair—if it's a good texture and with a great haircut—can work. So break down that myth of, 'I'm in my 40s. I've got four kids. I need a soccer mom bob.' No soccer mom bobs anymore!"