I believe most if not all are straight up idolatrous, because most - if not all - say things like "I can't go on/live/exist/be/survive/etc. without you" and excessive and exaggerated things like that.
If it is a male who sings, he puts the woman like the greatest thing ever and like a god and his only reason to be and exist. I think women are less excessive than men in this.
I know most today are of course straight up immoral and pure lust, but i am referring mainly to the "old songs" like the ones from the 60's and 70's etc.
What was the Church's stance on so-called pop music before Vatican 2?