Irony, Post-irony, or am I Just Thinking Too Much?

One of the strange things about being a 40 year old guy living in a college town is that you feel alternately younger (there's a lot of young people around, a lot of things that cater to young drunk people, like bars, pizza joints, wing joints, taxis, tailgating, bands, bars, etc), and really old and out of touch (like, there's a lot of young people here). One of the things that falls into that category is the awesome and sometimes baffling Penn State radio station, The Lion 90.7.

My question is this: when The Lion plays a series of tunes that goes something like the following, what does it mean?

(note that this list is by memory and probably not completely correct, and that they are currently playing, no lie, "So Into You" by the Atlanta Rhythm Section):

Like a Virgin, Madonna
Crosstown Traffic, Jimi Hendrix
I'm Amazed, My Morning Jacket
An Innocent Man, Billy Joel
Paul Revere, Beastie Boys
We Are the World
Me and My Uncle, Grateful Dead

So what the fuck is that? I know, there are a fair amount of hippie songs in there, and granted, it's not a real playlist, just an approximation, and a pretty good one, I think, of what I routinely hear on that station. For instance, I know I've heard "We Are the World" at least twice in the past week, which is twice more than the previous ten years.

The question is: the Madonna, the Billy Joel, the We Are the World, the Atlanta Rhythm Section. Is that ironic? Or are we so past irony that they're listening to these songs and saying, shit man, you know what, An Innocent Man is just as good a song as Crosstown Traffic or My Morning Jacket, and fuck you if you have some kind of preconceived old man notion about the level of coolness of post-Glass Houses Billy Joel?

Ironic or post-ironic? Or am I just too old and opinionated to even parse what's happening here?