1. It's way too long.
Über-long hair is a tough look for over-40 women. "I call it the '1661' — a woman's long hair makes her look 16 from the back, but from the front you see she is actually nearing retirement age," says Pantene celebrity hairstylist Danilo. A universally flattering length: to the collarbone. "A cut that grazes the collar and has face-framing layers also draws attention away from an aging neck," says Jet Rhys, a San Diego-based stylist.