No song is meaningless, you might be thinking what the person is singing does not have meaning but some are using it for chairing up, however we have gospel songs of God and so many others that may not have anything relation to God but that does not make it bad songs or meaningless because if we feel that a lot of those songs are meaningless are those wealthy people who might be listening to it an unreasonable person?, actually there is how hip pop is, if you don't listen very attentively you might not even hear what they are single because they are always singing as if they are rapping.
@Roseline492, don't be offended but I totally disagree with all you had to say. There are songs that are meaningless, and by meaningless we literally mean songs which lyrics adds no substantive value to the society. People just listen for listening sake, perhaps it could be that the hip-hop song has some good beats which people can just dance to the beats and nothing more. It doesn't majorly has to be said to be a religious song or not but it's just without meaning to ponder on.
I'm not actually, because you are entitled to what you believe is true no matter the different thoughts of another about it, however I wasn't throwing my emphasis about it on the importance or what is teaching in the society, my direction to it was on the pleasure basis, so if you said some songs are meaningless because is not saying anything about the society people should no or learn then you are right because a lot of them doesn't talk about society but however a song cannot be sang without inspiration, so something must be the inspiration of the singer and it can be considered as a meaningful to him in respect to what activated it.