As the father of a boy, I've put some thought into this. Young teenage boys are desperate to prove they're not tweens, and - worse - not girls. So it becomes vitally important for them to loathe everything young girls like, especially music and celebrities.
When I was a kid it was Bobby Sherman. (How it hurts to write that!) I remember when it was Britney Spears and Justin Timberlake, who are both treated like (somewhat) serious artists today. Whoever Harry Styles is, good on him!