Michelle Williams' short hair helps change the shape of her face. With longer hair, her face becomes round, and with shorter hair, it lengthens a bit.
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Things definitely changed for Emma Watson after she cut her hair. Her career has taken a completely different turn since Harry Potter.
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On the television show "Once Upon A Time," Ginnifer's cut helps viewers distinguish between Snow White & Mary Margaret. It also helps her step away from characters and into real life, as her contract has a claus for her to wear wigs.
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Carey's short cut is versatile and easily changes colors. At times, it can even have some curls.
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Hallie's short hair has become so much a part of her identity. She made short hair sexy.
Natalie Portman had to shave her head bald for her role in "V For Vendetta," but she looked great as it was styled into a pixie cut as it grew back.
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The ever-evolving styles of posh Victoria Beckham has included short hair cuts in the past.
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Keira Knightley has worn her hair short in the past, and way before it was a popular trend.
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Pink's short hair has always been like a sort of rocker rebellion against the longer tresses of other pop stars.
Evan Rachel Wood
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Evan Rachel Wood is among the latest celebrities to join the pixie cut trend sweeping Hollywood.