I have noticed in several markets and here that some older songs have been appearing on playlists where they weren't before. For example, a lot of CHRs and Hot ACs spin Bye Bye Bye and I Want it That Way from 1999/2000 when those songs were off playlists say 10 years ago. I even see Z100 in New York spin things like Complicated by Avril Lavigne from 2002, though it was around Hot AC for a while that one.