And fortunately for Bieber, he's proven with "What Do You Mean?" that he doesn't need Skrillex and Diplo to push ahead into his brave new world. Working with Jason Boyd and Mason Levy, Bieber (who once again co-wrote and co-produced) has created an appealing pop/EDM song that brings the burgeoning tropical house genre to its highest chart position yet. But aside from being catchy, it's also convincing: Bieber sounds at home with sad, searching lyrics that are counterbalanced by airy, jaunty music.