Though we'd grown used to a dark-haired Kim Kardashian for years and years, she's recently switched that up by going blonde, a transformation that apparently took 17 hours. Since then, she's been having fun with different lengths and shades, like that brief foray into icy-blue territory over Christmastime. She also said on Twitter the thought of going back to dark hair "makes her sad" so she chose a bright and happy color, instead, and opted for pink hair.