It's hard to believe this girl, with her stringy hair, unflattering hair color, heroin-chic eye makeup and washed out skin is the same Mischa Barton. Experimenting is great, and playing with new looks for special occasions is totally in bounds. Just make sure it's always flattering. Many a celebrity has proved that stringy hair isn't flattering on anybody.
From frumpy to fabulous or dazzling to dumpy, these celebrities set the example for how to transform your look -- for better or worse.