You mentioned Sing Sing Sing before, and it's already a pretty familiar song, so I worried that it might not be a good idea because too many people would already know it. However, there were some dance parts of that medley (maybe parts of Sing Sing Sing, I dunno, I'm not familiar with every aspect of it) that were unique enough that they could be used, and it would only be for 30 secs to a minutes anyway of music needed. That could be a reasonable song to put there. Good call my young padawan ;)