When Justin Bieber greeted Canadian Prime Minister Stephen Harper while wearing overalls Friday, his choice of informal attire didn't go unnoticed. While Gawker proclaimed him a "white trash prince," the 18-year-old pop star took to Instagram to defend what some considered a sartorial faux pas.

Bieber posted a screen shot of a Daily Mail article concerning his "wardrobe fail" and explained to the writer that the photos were taken at a hockey arena where he was performing that day, and he simply didn't have time to change his outfit before meeting with Harper.

Of course, Bieber isn't the only celebrity to step out in overalls. Heidi Klum, Katie Holmes and plenty of other stars have made the playful fashion statement.