1:10 is the main reason why. Remember, he doesn't know these people at all.
Also just to note, the increasing uniformity in pop music is making the music industry over all less and less talented. Justin Bieber isn't an exception considering how "Safe" and soulless his music usually is. People get pretty frustrated about this. Its sort of similar to the whole twilight brigade. Jealousy could also be a factor to some extent for some considering girls are focusing their attention on someone else.