I've already heard his voice on Marvin Gaye, See You Again, Hotline Bling, and Nothing But Trouble. I mean, he has a nice voice, but I feel like it's missing that OOMPH that you get when listening to an artist that makes you go, "OH! Now they have something."
Idk. In my opinion, his voice just isn't suited for hip-hop, but that's just my opinion. What do you girls think?