Music is amoral. There is nothing inherently good or bad about the sounds that are made from strings being strummed, or drums being banged, or the air blowing through holes.
This whole idea of tagging music as "Christian" or "Non-Christian" only leads to legalism and confusion.
For instance, God made the world around us, and He said His creation was good. If I wrote a song about my backyard and the beautiful flowers and creek that runs through it, would that be a "Christian" song? What if the song never mentioned God?
Also, consider that the very first institution that God created was marriage, even before the law. We are created as relational beings, and relationships are beautiful and good. Have you read Song of Solomon? What if I wrote a song about my wife - about how beautiful she is, about how lovely our relationship is, and about how I will love her all my life. Is that a "Christian" song?
Consider the Christian artist who covers a "non-Christian" love song, but instead the Christian artist sings the love song to God. Does it suddenly become a Christian song?
What of the music of Bach, who signed all his work Soli Deo Gloria (Glory to God), yet his music didn't even contain lyrics! Was that "Christian" music?
Bottom line, there's nothing wrong with listening to that soundtrack.
