Oh, Justin Bieber went there!
In an interview with Great Britain's Rollercoaster magazine, the formerly shaggy-haired singer took aim at British royalty and said of Prince William's scalp:
"I mean, there are things to prevent that nowadays... 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?"
The response from our pals overseas? Not positive.
According to journalist Jessica Callancitizens (via The Huffington Post), residents "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... Will 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."
In a previous interview, Bieber also insulted Canadian Aboriginals.
What do you make of his comments regarding William's hair?