>>Why is that different?
>1) the radio stations aren't selling the songs; B) it's done with the permission of the record labels (which usually do the radio edits themselves) and III) deleting foul language is required by federal law.
They are selling them! You can purchase "Radio Disney" versions of pop songs that are the same versions heard on Radio Disney stations with the edits included. Check out song number 4 at this link:
http://www.amazon.com/exec/obidos/tg/detail/-/B0002M5T2A?v=glance
That's not a radio station selling anything; it's a record label that belongs to the same company as a radio network. And the crucial point is that, presumably, they are doing so with the permission of the copyright holder.