DOOT DOOT.
So, if your character was out in a certain section of the Hogwarts yard (only one part of it, because the stipulations for renting out the yard were that there was still plenty of room for students to enjoy being outside without participating) for the first day of the protest today, they'd hear some of these albums or singles playing, magically amplified to a manageable level, because Lily doesn't need McGonagall hating her guts.
I'll ... probably think of more later, but feel free to comment with some Muggle music if your character brought their own! And feel free to have your purist character haaaaate on this.