Hearing songs during commercials

[BROWNJB1]

Whenever you listen to either American Top 10 or American Top 20 or both, do you ever hear songs while the shows are on commercial break on your local affiliate? For example, while you are listening to either or both shows, they are on commerical break, and then a song from years past comes on and after that song is over then they play commericals again. That happens here regularly when I listen to American Top 10 on WNIC 100.3 FM, here in Detroit.

[Radioman]

My opinion: Nothing special ! This happens and has happened on many stations before.
If there is less local content, some station use this for filling up the hour. If there is much local content, some station use this for rounding up the show to 3 and a half hours or so.
Also a regular practice for foreign outlets, since they don't have to use the network commercials.