Rivals Justin Bieber and Shawn Mendes joke about fighting with each other!May 4 (AZINS) Shawn Mendes isn't too sure if he would beat fellow competitor Justin Bieber in a fight.

According to reports by US Weekly, Mendes, 20 who was recently featured on Elvis Duran and the Morning Show said, "I think I'm bigger, and I weigh more. I think he has another, like, type of level that he can click into that I don't have. I don't possess the switch that I think he [has]" Justin Bieber ribbed 20, Mendes last month after he posted a cover of The Observer Magazine that declared him the "Prince of Pop."

"Hmm, Gonna have to break a few more records to dethrone my title there bud," wrote 25, Bieber.

On Friday, May 3, Mendes said on the show, he regretted his Magazine Post on social media, "I'm not going to lie, when I got the photo from that paper, I was like, 'Should I post this? I don't want people to think I'm saying I'm the prince of pop. It's just what the headline said and the photo.

And there are other princes of pop, like Bieber. I was like, 'No, I'm just going to do it. It's no big deal.' The second I posted it, I was like, 'Shouldn't have done that!"

Singer Mendes shared the cover page of Observer Magazine on his Instagram account. The Magazine featured him posing with the words "Prince of Pop" written over his photo.

However, Shawn Mendes found Bieber's comment funny, "He is so funny. And I honestly pretty much live to read the comments that he posts on photos now because they're hilarious. He's so real-life about everything now. It's great."

Also, Shawn referred to the "Baby" singer as one of his inspiration. "He is one of the main reasons I started doing what I do -- and probably not just me [but] many, many other pop artists and other artists in the industry right now. He's a trailblazer," he said.