Bleach blonde and blowing in the wind one day, My Little Pony purple the next. As music's good-boy-gone-bad Justin Bieber transforms with each new year, his hair seems to take on a life of its own ...

Wanna participate in an online challenge that doesn’t require you to kiss a cow or eat a Tide Pod? Then the “Purple Shampoo Challenge” might be just the thing for you. The new craze ...