Justin Bieber Challenges Shawn Mendes To Hockey Match For 'Prince Of Pop' Title

Justin Bieber and Shawn Mendes are going head to head – but it’s all in good fun.

The Canadian pop stars started a mock war over Instagram Sunday after Mendes, 20, posted the cover for UK newspaper The Guardian’s weekly mag, The Observer, on which he’s dubbed the "Prince of Pop."

Justin, naturally, jumped into the comments. Referring to the fact that both he and Shawn are Canadian, he wrote, "Hmm. Gonna have to break a few more records to dethrone my title there bud (canadian voice)."

He then continued, "but if you want, we can play hockey for it but i heard youre a real bender on the ice we could just drop the buckets and tilt for it."

To which Shawn replied, " "LOL any time any day you just let me know!!!!!!"

Fans immediately started arguing in the comments as to which singer is really the Prince of Pop, which led Justin to add, "There is no competition and it was a playful joke people relax.. there’s no sides we’re all just here to make dope music."

"I’m just competitive as is he so it was just a little playful jargon," Justin added.