Bruno Mars may be a playboy, but who would've expected him to make the cover of Playboy magazine?  According to The Hollywood Reporter, Bruno is only the 10th man ever to grace the cover of the legendary men's magazine -- his appearance is in connection with the mag's Sex and Music issue, which is out March 16.  He appears on the cover with Playboy Playmate Raquel Pomplun, and in a fashion pictorial and interview.  He is not posing with any naked women, however.