Try using some older/more obscure songs. If every chapter does a rush video there are chances that some of the more obvious/popular songs will be used previously, and rushees will get tired of hearing the same thing. (This was touched on in a thread where we found out we ALL sang "Pass It On" at some point in our rushee/sister life
) Plus if you use a song that is specific to your chapter, the rushees will be able to look at your faces when it is playing and tell it has special meaning to you.