Charlie Puth Is Pretty Sure Shawn Mendes Thinks He's a Crazy Person

Charlie Puth is all smiles up on stage while performing at the Global Citizen and Cadillac Present: The Accelerator Series concert in New York City on Tuesday (August 29).

The concert series honors leading social entrepreneurs who are driving systemic change and creating solutions to global problems.

PHOTOS: Check out the latest pics of Charlie Puth

Speaking with USA Today recently, Charlie admitted that he’s pretty sure that Shawn Mendes thinks he’s a crazy person now.

“I was digging a hole on a beach yesterday with Shawn Mendes, and I started thinking of a song,” he shared, speaking of how inspiration can strike him anywhere.

Charlie adds, “I think he thought I was a crazy person, because I just started humming. I was in my happy place.”