Justin Bieber believers best ignore the pop star’s latest fashion statement.

Here’s some advice: when meeting high authority in any given country, dress appropriately.

Canadian Prime Minister Stephen Harper bestowed the 18-year-old with a Diamond Jubilee Medal, which honors significant achievement by a Canadian, on Nov. 23. It’s one of the nation’s highest honors.

So what should Bieber wear to this obviously formal occasion?

The lone photograph shows a suited-up Harper shaking hands with Bieber’s unbuttoned overalls, white T-shirt, silver chain and backward baseball-capped self.

Not exactly the “Boyfriend” every girl dreams of.

Gawker gave Bieber the title “White Trash Prince” after the incident, reinforcing its stance as one of news’ biggest trolls.

Bieber has come out in defense of the photograph on Instagram, saying, “The pic of me and the prime minister was taken in a room in the area where I was performing at that day.” He continued by saying, “If you … expect me to have a change of clothes let a loan [sic] a suit at that specific time that’s crazy. Wow am I ever white trash.”

That’s fair. Bieber likely wouldn’t have time to change in and out of a three-piece suit for a single picture before or after a show.

But that ignores the bigger question: Why is he wearing unbuttoned overalls to one of his shows? Judging by the rampant grammatical errors in his response, he might just not care.

I know he’s not the pinnacle of fashion, but the white trash look should be an obvious no-no for everyone. It died before fashion existed, when dinosaurs roamed the Earth wearing nothing but the skin on their backs.

This isn’t the first time he’s donned odd garments. He’s a huge fan of drop-crotch pants in multiple colors. And these crotches aren’t slightly dropped — the cut is down to his knees.

Bieber also changes costume multiple times during each show. Would it have been so hard to visit the prime minister in anything else?

Seriously, anything. A diaper. T-shirt and gym shorts. Pants so drop-crotched they’re like a long skirt. Any garment in the world besides unbuttoned overalls with a backward cap.

Harper is the prime minister of your home country, Bieber. Not one of your “Beleibers.” He runs your country’s government.

He’s giving you an award. Dress respectfully.

I know breaking up with Selena Gomez was hard, but it’s been a few weeks. Time to move on. Don’t cope with your broken heart by dressing like a fool.

This columnist’s views do not represent those of The Daily Reveille.