The Beauty Treatments Our Editors Regret the Most

"Going platinum blond — or rather trying to. I had a pixie cut at the time, so I assumed it would not be a major issue. Instead, I returned to the salon repeatedly for many hours at a time with bleach burning my scalp each session (and that's no easy feat because I loathe being at the salon for more than an hour) and never achieved the color I desired. I got to the point where I just gave up and went straight to single-process brunette, and I've been happy ever since."