Bruno Mars was arrested in Las Vegas in 2010 for cocaine possession, and that arrest is the reason the bruno mars mugshot became one of the most recognizable celebrity booking photos online. At the time, he was still early in his career, which made the story even bigger because he was already starting to become a major pop star. The incident happened at the Hard Rock Hotel & Casino and quickly drew public attention because of the unusual details surrounding the arrest. The bruno mars mugshot spread fast because Bruno Mars looked unusually relaxed in the photo, which made the…