I can't say I absolutely hate HSM; I just detest it. It's normal nowaday's Disney movie; harmless but it repeats the same stereotypes. Main actors are beautiful (?), fat people are embarrassing, the popular people are from cheerleading or sports teams... Disney nowadays

Acting isn't spectacular.
Now, singing isn't all that good. Songs aren't half that bad. I mean, the music is okay but the lyrics are horrible clichés:
"Everyone is speacial in their own way, we make each other strong.
We're not the same, we're different in a good way, together's where we belong."
I think I've heard something like that before.
The movie is all about how you should "Stick to your status" and forget your stupid dreams and still two most unlikely persons to go together become a pair... I think, I never watched the movie to the end.
Singing is overrated. The teens aren't even really singing, it hurts my ears to listen to them. Either there has been a lot of mixing or everyone are just pretending. You decide.