OVERRATED: Bruno Mars

As Usher and even Justin Bieber have proved, the world needs young singers to step into Michael Jackson's shoes as princes of pop. And despite a promotional push that included a puzzling (and not very funny) double-dip into hosting and performing as musical guest on "Saturday Night Live," there just doesn¿t seem to be much new to be heard from Mars. Is it a good sign when an "American Idol" cover of his "Runaway Baby" outshines the original?