In the photo above it kinda looks like Bruno is saying "Dude, it's not that serious".

According to USA Today, An Indiana man went to jail over the weekend over a disagreement with his friend of 50 years over a Bruno Mars song. Roger D. Washburn, 71, is facing a charge of battery after the Friday night incident at his home in Greenwood, Ind. According to police reports Washburn and some friends were hanging out when an argument over who sang a song and the artist that performed it got out of hand.

While the friends say the song was by Bruno Mars, Washburn disagreed and when he was proven wrong, the argument only got uglier and Washburn pulled out a gun.

The man said he responded to the brandished weapon by calling Washburn a "chicken (expletive)" and Washburn swung the weapon at him, striking the man in the face and arm. The gun went off when Washburn struck the man, he told police. The victim said he took a swing at Washburn and missed, and the gun then went off a second time. No one was shot during the incident.  - via USA TODAY

No one wanted to report the story to police until a few hours later when Washburn admitted to hitting his friend with his .38 revolver and he was taken into custody.

While we don't know what exact Bruno Mars song it was that caused such fierce debate, we'll leave it up to you to decide. What song do you think started the argument: