As has been said already, modern pop isn't my thing at all, so I'm automatically going to dislike those "musicians". As a musician who's had to sit through a Bieber song because it played as work, the kid pisses me off. The main vocal melody had an obnoxious "I don't know now to sing at all" level of autotune on it that any self-respecting singer would be ashamed of. I can understand saving time on rerecording with some pitch correction, especially on harmony lines, but the main melody should not be that hard to sing, especially in generic, only-appeals-to-teens pop music.