Don't forget kpop as well. Most of the kpop male artist looks like ah gua to begin with.
[video=youtube;zoTkTOKXA0A]http://www.youtube.com/watch?v=zoTkTOKXA0A[/video]
Perhaps pop music has something to do with it. Justin Bieber, Adam Lambert and One Direction are set as icons, so the younger guys want to emulate them: in fashion and in behaviour.
Back in the 80s and 90s, there were rock ballads, love ballads. Even the post-Thriller bleached Michael Jackson, was more of a man than the current crop of 'pop singers'.
[video=youtube;zoTkTOKXA0A]http://www.youtube.com/watch?v=zoTkTOKXA0A[/video]