Teenage heartthrob, Justin Bieber, is known for many things. The gazillion views on YouTube videos to hoards of girls following his every move - Justin Bieber has got them all.

One other thing the Canadian Crooner is known for is his iconic bed of hair. Still, having the sleek and swag-looking hair is not enough for Justin to diss member of the royal family, Prince William.

Bieber has been quite the busy bee this year with his "Believe" tour and boyfriend duties on the side to equally talented, Selena Gomez. Still, with all the stress Justin appears to go through, his hair looks as attractively pleasant as ever. Would this be Bieber's reason as to why he had to smack dab jokes at Prince William's hair? In an interview with Rollacoaster magazine, the 18-year old singer picks on Prince William's hair problem.

"I mean, there are things to prevent that nowadays, like Propecia," said Bieber, adding, "I don't know why he doesn't just get those things, those products. You just take Propecia and your hair grows back. Have you not got it over here?"

While "Beliebers" casually shrugged it off as a joke, some have not been particularly impressed with Justin Bieber - specifically close supporters of the British royalty. Justin Bieber has been thrown in the heat of things gaining backlash from UK fans jumping to the defense of Princess Diana's son.

"The Brits are viewing Justin Bieber's diss about Prince William's challenging hair problem in the same way you view an annoying fly buzzing around you. He needs to be swatted away," says Jessica Callan, British author of "Wicked Whispers" and journalist.

"Wills and Prince Harry may joke about William's thinning hair, but that doesn't mean a kid like Justin can come sauntering in and join in the joke. It's like inviting someone over for dinner and they tell you how awful your carpet is. Even if you agree, how dare they say it? So the Biebs had better watch out! Wills may be thinning on top but he is one cool royal and landed himself the hottest future queen England has ever had. How can Justin and his girly hairstyle possibly compete with that?" added Callan.

Bieber best prepare his best apology if he doesn't want UK fans to start running after him to create an "Alopecia" problem of his own.

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