Justin Bieber is not here for Shawn Mendes being handed the title the "Prince Of Pop" and even slid into Mendes' comments section to challenge him.

"Hmm gonna have to break a few more records to dethrone my title there bud (Canadian voice)," Justin wrote. "But if you want we can play hockey for it but I heard your [sic] a real bender on the ice we could just drop the buckets and tilt for it."

The Observer Magazine featured Mendes on the cover giving him the title and Mendes shared the cover on his Instagram page.

Justin may also be a little salty as his now wife, Hailey Baldwin used to date Mendes who appears to have eclipsed Bieber on the pop charts.

Mendes appeared to take Biebs' challenged on the chin as he responded:

"LOL any time any day you just let me know."

Is Justin about to head back to the studio and release some new fire?