It's Z so what else could I do. I had nothing on my own so I had to look it up. Z was there in the form of a fine sounding group called Zoe Girl. Based on this song I would buy their music since it is similar to some other groups I enjoy listening to (maybe like Sixpence None the Richer for example?).
They are a Christian group and their name begins with Z. I walk away from this Challenge a winner.