The squeaky sound that comes from a 16 year old boy who's balls haven't dropped. Oh wait that's Justin Beiber, not music.
The electronic sound of a woman who can't carry a tune so her voice must be synthesised. Oh wait that's Cheryl Cole, not music.
The sound of emotions conveyed in a way that has an effect on the listener. That's music - and poetic! YAY poetry! ^w^
Justin Beiber: (Screeching) BABY, BABY, BABY, OOOH!!
That Person stood next to me: OMG!! His music is awesome and he's such a fitty.
Me: O.o Are you serious?! The noise coming from that ten year old girl sounds like a strangled cat.