course it is, keep the comptitors thinking and give the judges a chance to see the competitors at best. Having a good mix of music is the key, especially at advanced level, throw in a slow tune then shock them all with something funky n' new...
At beginer level it doesn't matter too much, just needs to be fairly easy to dance 2 n' have a little inspiration in there to keep them interested, as they won't have the skills the advanced dancers do to interpret music yet!!!
