Bruno Mars reveals sophomore album title and release date

I was just wondering the other day when Bruno Mars was going to follow up on his debut album and it looks like I have an answer as the new Billboard cover artist reveals to them that his sophomore album will be called, Unorthodox Jukebox, and impact on December 11th. As reported yesterday, his first single "Locked Out Of Heaven" will premiere Monday evening, October 1st. 

Bruno fans, who do you hope he works with on this upcoming album?