Dancer/choreographer Bree Hafen has written an excellent article about the role that music plays in her dance life on her blog. It’s called The Mystery of Music Decoded.
I think the best part of Bree’s article is how she explains how much care she takes when selecting music to match the song to the age-level of the dancer(s). It’s also great to get her insights into how important music is since it provides the emotional foundation of the entire dance.