Rihanna owns her sassy short cut with a long angled fringe. The long layers on top give her amazing versatility.
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Angelina Jolie
The "cat eye," is now the Angelina Jolie eye to many women. When you find a makeup style that makes the very most of what you've got, stick with it. You can vary your look with different liner colors and lip colors.
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Paris Hilton
Paris Hilton's high-maintenance look has her in a rut. We'd love to see her drop all the artifice and run out the door in bronzer and a messy ponytail.
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Michelle Williams
Michelle Williams is a style icon dark horse. She has perfected the essence of nonchalance with her varied casual updos and minimalist makeup. But her look never gets boring.
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Miley Cyrus
When you think about Miley Cyrus, what comes to mind? If it's miles and piles of uber-long wavy hair, that's not a good thing. A good signature style is owned by the wearer, not the other way around.
Establishing a signature style can be a great way to make a statement, as many celebrities know. But it can also turn into a rut. Look to these best and worst examples for clues on how long you should stick with your signature style and if it's really right for you.