The Beauty Treatments Our Editors Regret the Most

"When I was in high school, moments before a haircut appointment, I decided on a whim that I wanted to dye my hair for the first time. I had been eyeing a dip-dyed look (it was in at the time, OK?), where the ends of my dark-brown hair would be a blond hue. The stylist reassured me she could easily do it but my virgin hair ended up posing quite the challenge for her. Five hours later when we finally lifted my natural color enough to apply the blond dye, I was regretting my choice. I left with brassy, straw-like ends that I wound up chopping off a month later. (Thank god I only did the bottom inch of my hair.) I've yet to dye it again."