refers to a song with a kinda simple lyrics, that's suitable for being sung. One of those songs that get stuck in your head pretty easily and make you sing it endlessly.
church hurt is where you experience a degree of distance, pain, or judgement from your church community. Essentially, you are just unable to “find your place”. This is prevalent in the Christian community, but can be extended to other religions.
Now that I am an adult I am beginning to heal from the church hurt that was inflicted on me as a child.