Everyone's got an opinion about who ruled 2013 -- at Billboard magazine, the answer is Bruno Mars.

Billboard based its decision on the 1.8 million copies of Unorthodox Jukebox sold, his three Top 10 singles and the success of his Moonshine Jungle tour -- which racked up $46 million in ticket sales.

Mars attributes his success to knowing when to hold 'em and know when to fold 'em. He says, "We all know when we're onto something, like with 'Locked.' It was, 'Man, there's a good pocket on this song right now. Let's keep it going.' We also know when something's not jelling. And that's the thing you pray you will always have. You can't believe that everything you do is hot."