Once upon a time, Ke$ha was the only person with rainbow colored hair — and everyone thought she was a hot mess. Then celebs like Lauren Conrad, Demi Lovato, Kelly Osbourne, and Katy Perry jumped on board the hair chalk train, and suddenly you just weren't cool if your hair was a color found in nature.
At the most recent New York Fashion Week, purple, green, pink, and tie dye strands were practically a requirement to get into the shows. Here, 14 pieces of hairspiration (snapped by Bustle's fantastic street style photographers) to encourage you to finally take the rainbow-coated plunge.
Image: Brent Karwatowski