I didn't notice it but they were talking about this on Classic Hits this morning.
"Well I heard what Finn was saying about us,
Well I heard old Neil put us down,
Well I hope Neil Finn will remember
An Idol show don't need him around anyhow"
(Thanks spazz, idoltoday and Nellie)
Classic song to change a couple of lines for, especially when the original song has political statements in it sliced in.
Update: it was completely the contestants' idea, yay :D