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It's truly a Justin Bieber world, and nowhere is that more apparent than in the fuss over the teen star's swoopy 'do.

Even his stylist, Vanessa Price, has her own agent to help field interview requests from the numerous reporters frantic to have their questions about Bieber's hair answered.

"There are different variations, but it is definitely about the swoop in the front. Definitely about the bangs," Price told The Sun recently. She then confided that Bieber favours Bumble and Bumble Creme de Coco shampoo and conditioner.

Meanwhile, Bieber -- who plays Rogers Arena in Vancouver tonight -- freely shared his styling tips with the New York Times. "My hair takes five minutes to do in the morning," he said. "I shower and as soon as I get out I just shake it and it just does that. For real."

But of course, Bieber is not the first teen idol that girls have swooned over, nor is he the first to have his hairstyle discussed and dissected. Remember Elvis Presley's pompadour, with that little lock of hair that just wouldn't behave?

Let's take a look at a few memorable teen idol tresses through the ages, from the Beatles to the Bieber.