Jennifer Aniston Hairstyles

Jennifer Aniston knows a thing about celebrity hairstyles.

The woman who popularized The Rachel was asked, while promoting Horrible Bosses in London, to weigh in on a rumor that Prince William is being encouraged by some to get a cosmetic procedure atop his dome.

We're talking about a hair transplant.

Jennifer Aniston was quick to advise against this - not that he would anyway, in all likelihood - saying William is perfectly handsome the way he is.

"I think he should just let whatever's happening happen. Don't you?" Aniston said on Britain's Capital FM radio. "Well, now if we see him with a hair transplant, then we're going to be like, 'Oh, he had a hair transplant.'"

"I think there's nothing wrong with it, like Ed Harris. Gorgeous."

We agree, and imagine Kate Middleton does as well.

It won't get as much publicity as Justin Bieber's haircut, but Jennifer Aniston lopped off several inches of her world-famous locks just yesterday.

The actress stepped out for a photo call on Tuesday in Madrid, Spain for Just Go With It, debuting a dramatically shorter, chin-length new bob.

Just a day earlier in Berlin, her blonde locks fell past her shoulders, as you can see in the photos below. Do you like the change? Vote here!

Jennifer Aniston, posing for a 2009 calendar in which she doesn't wear a bra in the shower? HOT!

There's no debating the beauty of this actress in most settings, especially when she lets the water run down her body and over her breasts and... sorry, where were we?

Right. We can all agree that Aniston is an attractive individual - but is she more attractive based on what style she wears her hair?

You tell us!

Which hairstyle do you prefer on Jennifer Aniston?

Jennifer Aniston has one of the best heads of hair in Hollywood - among other attributes, as her 2009 calendar and that amazing nude GQ cover have proven.

The Marley & Me star showed off her gorgeous hairstyle at the film's premiere, rocking relaxed layers with a little texture for good measure. She's stunning.

Perhaps taking a cue from the actress is The Hills' Lauren Conrad, who showed off her own long layers this week at the D&G store opening in Los Angeles - albeit with a wavy twist and a pretty black bow to add some flair ...

Which of these celebrities' hairstyles do you like best? Tell us in the poll below, which we have a feeling could be decided by... yes, a hair: