Katie Holmes long hairRemember when Katie Holmes was better known as Dawson's love interest than the taller half of TomKat? When she was more likely to dress like she shopped at JCPenney than in Paris? And when she had that long, thick hair? Well, that Katie is back! Or, at least, her long hair is.

At the Japanese premiere of "Valkyrie," Katie had long, loose waves that would make Joey Potter proud. And while we definitely approve of the change (not to say we don't love her sleek, chic, shorter hair too, because we do!), we're wondering what prompted it.

Katie's been under scrutiny for her thin frame recently -- she's reportedly undergone a drastic Scientology detox (a Purification Rundown, according to the Daily Mail) in order to prepare her body for a second pregnancy, and it's left her looking a little frail. Maybe this was a way to draw attention away from it (or cover her protruding clavicles).

Christo Dishes on Short Dos

    Gennifer Goodwin made a seemingly overnight tress-formation, appearing at the He's Just Not That Into You premiere on February 2 with long, wavy locks. Two days later, she rocked a straight, shoulder-grazing bob. We're loving the new do - how about you?

    Paris Hilton has joined the Katie & Posh Club, shrinking her long blonde locks into a chin-length crop. We say "shrinking" because it's hard keep tabs on the extension-fanatic's true lock length. But hey, when you have your own line of hair extensions (Hilton's line is called DreamCatchers), your chameleon-like hair length is your best advertisement. Before you follow Hilton's, lead check out what stylist to the stars Christo told StyleList about how to pull off a short do.

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    Jessica Alba went from a flowing romantic 'do to a chic and edgy bob.

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    Victoria Beckham: Before the Cut

    There was a time when Posh had long, flowing locks (well, extensions) before she went for her dramatic razor cut bob that kicked off the trend in Hollywood.

    Milano Collezioni Uomo, Getty Images

    Victoria Beckham: Short Do

    "Victoria has a great bob that works with her style," says Christo. "There are not too many hair textures that can pull off this look; it has to be fine and straight." One advantage of a shorter cut? "They are fun to play with and can be very versatile. Ask your stylist how to play around with styling tools to create different looks."

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    Katie Holmes: Before the Cut

    When she started dating Tom Cruise, Katie's hair was long and straight.

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    Katie Holmes: Short Do

    "Katie Holmes can pull off a short cut," says Christo. "She went from a young pretty girl to a sexy woman who turns heads." But Christo warns, "Don't forget you need to be backat the salon 4-6 weeks after getting a short cut. Be prepared to put the money and time in."


    Anne Hathaway: Before the Cut

    Before she chopped her locks for her upcoming film Dancing With Shiva , Hathaway was known for her long, thick hair.

    Evan Agostini, Getty Images

    Anne Hathaway: Short Don't

    "Anne's stylist played it safe and gave her a short bob cut. She's a very pretty girl but this look doesn't accentuate her beauty," explains Christo. "With her facial structure, I would go with a shorter cut like Selma Blair's."

    Jemal Countess, WireImage.com

    Rihanna: Before the Cut

    The Barbados beauty and R 'n B star had super long hair when she first hit the charts as Jay Z's protege.

    Frank Micelotta, Getty Images

Or maybe it's a return to the way she looked when she and Tom fell in love. Or, perhaps, just maybe, Katie was simply up for a change -- we can certainly relate!

So what do you think? Is Katie's hair better short or long?