What's that song where the school children start chanting at the end?

[diamondsnake]

There is a song I really liked and it was by a popular band and it starts out as a normal song and then all of the sudden these children start chanting about leaving the school kids alone or something. Does anyone know what I am talking about? I'd really love to buy this song but have no idea who sings it or even what the song title is. Any help would be appreciated!